Reinstalling macOS is a piece of cake provided you have created a USB install disk for El Capitan to begin with. As you may have guessed, not many people take that extra step. In helping take the pain out of reinstalling macOS, Apple has included so-called Recovery Mode in macOS. Invoked at boot time, Recovery Mode helps you check your. When finished, OS X El Capitan will boot into a brand new clean install, running through the initial OS X setup process on the Mac as if the Mac was brand new. No files, no data, nothing will be on the Mac except for what comes with OS X El Capitan, that is what a clean install is for. In other words, these instructions describe the process for installing, reinstalling, or upgrading OS X El Capitan. You must have Internet access to complete this procedure. If you’ve never had El Capitan on this Mac, the first thing to do is visit the Mac App Store, download El Capitan (it’s free), and install it. Reinstall macOS. Select Reinstall macOS from the utilities window in macOS Recovery, then click Continue and follow the onscreen instructions. Follow these guidelines during installation: If the installer asks to unlock your disk, enter the password you use to log in to your Mac. If the installer doesn't see your disk, or it says that it can't.
Editor’s note: We've updated this guide for the release version of El Capitan (OS X 10.11), which was released on September 30, 2015. When OS X shipped on a DVD a good number of years ago, you.
If OS X El Capitan came preinstalled on your new Mac, you’ll probably never need this article until you decide to sell it. At that time, it’s a good idea to erase the disk and install a fresh copy of OS X for the next owner.
If you’re thinking about reinstalling because something has gone wrong with your Mac, know that an OS X reinstallation should be your last resort. If nothing else fixes your Mac, reinstalling OS X could well be your final option before invasive surgery (that is, trundling your Mac to a repair shop). You don’t want to reinstall OS X if something easier can correct the problem. So if you have to do a reinstallation, realize that this is more or less your last hope (this side of the dreaded screwdriver, anyway).
In this article, you discover all you need to know to install or reinstall OS X, if you should have to.Reinstalling is a hassle because although you won’t lose the contents of your Home folder, applications you’ve installed, or the stuff in your Documents folder (unless something goes horribly wrong or you have to reformat your hard drive), you might lose the settings for some System Preferences, which means you’ll have to manually reconfigure those panes after you reinstall.
And you might have to reinstall drivers for third-party hardware such as mice, keyboards, printers, tablets, and the like. Finally, you might have to reregister or reinstall some of your software.
It’s not the end of the world, but it’s almost always inconvenient. That said, reinstalling OS X almost always corrects all but the most horrifying and malignant of problems. The process in El Capitan is (compared with root-canal work, income taxes, or previous versions of OS X) relatively painless.
How to install (or reinstall) OS X
In theory, you should have to install El Capitan only once, or never if your Mac came with El Capitan preinstalled. And in a perfect world, that would be the case. But you might find occasion to install, reinstall, or use it to upgrade, such as
If your Mac is currently running any version of OS X except El Capitan
If you have a catastrophic hard-drive crash that requires you to initialize (format) or replace your boot drive
If you buy an external hard drive and want it to be capable of being your Mac’s startup disk (that is, a bootable disk)
If you replace your internal hard drive with a larger, faster, or solid state drive
If any essential OS X files become damaged or corrupted or are deleted or renamed
If you sell or give away your Mac
The following instructions do triple duty: Of course they’re what you do to install OS X for the first time on a Mac or a freshly formatted hard or solid-state disk. But they’re also what you do if something really bad happens to the copy of OS X that you boot your Mac from, or if the version of OS X on your Mac is earlier than 10.10 El Capitan. In other words, these instructions describe the process for installing, reinstalling, or upgrading OS X El Capitan.
You must have Internet access to complete this procedure.
If you’ve never had El Capitan on this Mac, the first thing to do is visit the Mac App Store, download El Capitan (it’s free), and install it. Once you’ve done that, here’s how to install, reinstall, or upgrade to El Capitan, step by step:
Boot from your Recovery HD partition by restarting your Mac while holding down the Command+R keys.
The OS X Utilities window appears.
Select Reinstall OS X, and click Continue.
The OS X El Capitan splash screen appears.
Click Continue.
A sheet informing you that your computer’s eligibility needs to be verified by Apple appears.
Click Continue to begin the process of installing or reinstalling OS X.
If you’re not connected to the Internet, you’ll be asked to choose a Wi-Fi network from the AirPort menu in the top-right corner.
The El Capitan software license agreement screen appears.
Read the license agreement and click Agree.
A sheet drops down, asking whether you agree to the terms of the license agreement.
Click Agree again.
Yes, you did just click Agree; this time you’re being asked to confirm that you indeed clicked the Agree button. If you don’t click Agree, you can’t go any farther, so I advise you to click Agree now.
Choose the disk on which you want to reinstall OS X by clicking its icon once in the pane where you select a disk.
If only one suitable disk is available, you won’t have to choose; it will be selected for you automatically.
Click the Install button.
A sheet asks for your Apple ID and password.
Type your Apple ID and password in the appropriate fields, and click Sign In.
Your El Capitan installation (or reinstallation) begins. The operating system takes 30 to 60 minutes to install, so now might be a good time to take a coffee break. When the install is finished, your Mac restarts itself.
If you were reinstalling El Capitan on the hard disk that it was originally installed on, or upgrading from Mavericks, you’re done now. Your Mac will reboot, and in a few moments you can begin using your new, freshly installed (and ideally trouble-free) copy of OS X El Capitan.
If, on the other hand, you’re installing El Capitan on a hard disk for the first time, you still have one last step to complete. After your Mac reboots, the Setup Assistant window appears.
Getting set up with the Setup Assistant
Assuming that your installation process goes well and your Mac restarts itself, the next thing you should see (and hear) is a short, colorful movie that ends by transforming into the first Setup Assistant screen (Apple Assistants such as this are like wizards in Windows, only smarter), fetchingly named Welcome.
To tiptoe through the Setup Assistant, follow these steps:
When the Welcome screen appears, choose your country from the list by clicking it once, and then click the Continue button.
If your country doesn’t appear in the list, select the Show All check box, which causes a bunch of additional countries to appear.
After you click Continue, the Select Your Keyboard screen appears.
Choose a keyboard layout from the list by clicking it once, and then click Continue.
If you want to use a U.S. keyboard setup, click the U.S. listing. If you prefer a different country’s keyboard layout, select the Show All check box; a bunch of additional countries’ keyboards (as well as a pair of Dvorak keyboard layouts) appear in the list. Choose the one you prefer by clicking it — and then click Continue.
The Select Your Wi-Fi Network screen appears.
Click the name of the wireless network you use to connect to the Internet, type its password, and then click Continue.
If you don’t see the network you want to use, click Rescan.
If you don’t use a wireless network, click Other Network Setup, and then choose one of the available options, or choose My Computer Does Not Connect to the Internet. Click Continue.
The Migration Assistant (also known as the Transfer Information to This Mac) screen appears.
Do one of the following:
Choose to transfer data, and then click Continue.
If this is a brand-new Mac or you’re installing OS X El Capitan on a Mac and have another Mac or Time Machine backup disk nearby, you can transfer all of your important files and settings by following the onscreen instructions and connecting the new and old Macs via FireWire or Ethernet cable.
Transferring data can take hours — that’s the bad news.
The good news is that once the data transfer finishes, you’re finished, too. In other words, you can ignore the steps that follow (which are only for brand new installations with no data to transfer).
Goodbye and good luck.
Choose not to transfer data, and then click Continue.
The Enable Location Services screen appears. Location Services allows apps such as Maps and services such as Spotlight Suggestions to gather and use data including your approximate location.
Select (or don’t select) the Enable Location Services on this Mac check box, and then click Continue.
The Sign In with Your Apple ID screen appears.
Do one of the following:
If you want to use your Apple ID with this Mac, type your ID (such as [email protected]) and password in the appropriate fields, and then click Continue.
If you don’t have an Apple ID or prefer not to use one with this Mac, click Don’t Sign In, and then click Continue.
To learn more about getting an Apple ID, click the blue Learn More link. In a nutshell, an Apple ID lets you make one-click purchases at the iTunes Store, iPhoto, or the Apple Store, and includes free iCloud membership.
The Terms and Conditions screen appears.
Read the Terms and Conditions and click Agree.
A sheet drops down to confirm your agreement.
Click Agree again.
The Create a Computer Account screen appears.
Do one of the following:
If you provided your Apple ID (in Step 6), select the Use My iCloud Account to Log In check box. Then fill in the Account Name (sometimes called Short Name).
Fill in the Full Name, Account Name (sometimes called Short Name), Password, Verify Password, and Hint fields.
This first account that you create will automatically have administrator privileges for this Mac. You can’t easily delete or change the name you choose for this account, so think it through.
You can’t click the Continue button until you’ve filled in the first two fields. Because a password is optional, you can choose to leave both password fields blank if you like. If you do, your Mac warns you that without a password, your Mac won’t be secure. If that’s okay, click OK. If you change your mind and want to have a password, click Cancel.
If you want a different picture, click the little picture to the right of your name (labeled “edit”) and do one of the following:
To take a picture of yourself with your Mac’s built-in camera, click the Take Photo Snapshot button. Then click Continue.
When the picture appears, you can change its size by using the slider control directly below the image and move it around in the frame by clicking your face and dragging. If you’re not happy with this snapshot, click Retake a Video Snapshot.
To select a picture from the Picture library, click the picture you want to represent you — the butterfly, dog, parrot, flower, or whatever — and then click Continue.
Click Continue to exit the Create a Computer Account screen. If you didn’t provide an Apple ID, skip to Step 13.
If you provided your Apple ID in Step 6, the Set Up iCloud Keychain screen appears.
Do one of the following:
Click Set Up iCloud Keychain. When the screen requesting your passcode appears, type your four-digit passcode, and click Continue.
If you’ve forgotten your passcode or don’t have one, click Forgot Code to Reset iCloud Keychain.
A verification code is sent to your iPhone or other Apple device.
Click Set Up Later.
If you choose this option, skip to Step 14.
Type the code in the verification field and then click Continue.
Wait a few minutes while your user account is created and El Capitan is configured for you.
The OS X Finder’s Desktop appears.
And that’s all there is to it. You’re done.
About Apple security updates
For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.
OS X El Capitan v10.11.6 and Security Update 2016-004
Released July 18, 2016
apache_mod_php
Available for: OS X Yosemite v10.10.5 and OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to execute arbitrary code
Description: Multiple issues existed in PHP versions prior to 5.5.36. These were addressed by updating PHP to version 5.5.36.
CVE-2016-5093
CVE-2016-5094
CVE-2016-5096
CVE-2013-7456
Audio
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to cause a system denial of service
Description: A null pointer dereference was addressed through improved input validation.
CVE-2016-4649 : Juwei Lin(@fuzzerDOTcn) of Trend Micro
Audio
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed through improved memory handling.
CVE-2016-4647 : Juwei Lin(@fuzzerDOTcn) of Trend Micro
Audio
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to determine kernel memory layout
Description: An out-of-bounds read was addressed through improved input validation.
CVE-2016-4648 : Juwei Lin(@fuzzerDOTcn) of Trend Micro; Jack Tang and Moony Li of Trend Micro working with Trend Micro's Zero Day Initiative
Audio
Available for: OS X El Capitan v10.11 and later
Impact: Parsing a maliciously crafted audio file may lead to the disclosure of user information
Description: An out-of-bounds read was addressed through improved bounds checking.
CVE-2016-4646 : Steven Seeley of Source Incite working with Trend Micro's Zero Day Initiative
bsdiff
Available for: OS X El Capitan v10.11 and later
Impact: A local attacker may be able to cause unexpected application termination or arbitrary code execution
Description: An integer overflow existed in bspatch. This issue was addressed through improved bounds checking.
CVE-2014-9862 : an anonymous researcher
CFNetwork
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to view sensitive user information
Description: A permissions issue existed in the handling of web browser cookies. This issue was addressed through improved restrictions.
CVE-2016-4645 : Abhinav Bansal of Zscaler Inc.
CFNetwork Credentials
Available for: OS X El Capitan v10.11 and later
Impact: An attacker in a privileged network position may be able to leak sensitive user information
Description: A downgrade issue existed with HTTP authentication credentials saved in Keychain. This issue was addressed by storing the authentication types with the credentials.
CVE-2016-4644 : Jerry Decime coordinated via CERT
CFNetwork Proxies
Available for: OS X El Capitan v10.11 and later
Impact: An attacker in a privileged network position may be able to leak sensitive user information
Description: A validation issue existed in the parsing of 407 responses. This issue was addressed through improved response validation.
CVE-2016-4643 : Xiaofeng Zheng of Blue Lotus Team, Tsinghua University; Jerry Decime coordinated via CERT
CFNetwork Proxies
Available for: OS X El Capitan v10.11 and later
Impact: An application may unknowingly send a password unencrypted over the network
Description: Proxy authentication incorrectly reported HTTP proxies received credentials securely. This issue was addressed through improved warnings.
CVE-2016-4642 : Jerry Decime coordinated via CERT
CoreGraphics
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to elevate privileges
Description: An out-of-bounds read issue existed that led to the disclosure of kernel memory. This was addressed through improved input validation.
CVE-2016-4652 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative
CoreGraphics
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to execute arbitrary code
Description: A memory corruption issue was addressed through improved memory handling.
CVE-2016-4637 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)
FaceTime
Available for: OS X El Capitan v10.11 and later
Impact: An attacker in a privileged network position may be able to cause a relayed call to continue transmitting audio while appearing as if the call terminated
Description: User interface inconsistencies existed in the handling of relayed calls. These issues were addressed through improved FaceTime display logic.
CVE-2016-4635 : Martin Vigo
Graphics Drivers
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A memory corruption issue was addressed through improved input validation.
CVE-2016-4634 : Stefan Esser of SektionEins
ImageIO
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to execute arbitrary code
Description: Multiple memory corruption issues were addressed through improved memory handling.
Os X El Capitan Keeps Prompting For Update Download
CVE-2016-4629 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)
CVE-2016-4630 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)
ImageIO
Available for: OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to cause a denial of service
Description: A memory consumption issue was addressed through improved memory handling.
CVE-2016-4632 : Evgeny Sidorov of Yandex
ImageIO
Available for: OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to execute arbitrary code
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-4631 : Tyler Bohan of Cisco Talos (talosintel.com/vulnerability-reports)
ImageIO
Available for: OS X El Capitan v10.11 and later
Impact: Processing a maliciously crafted image may lead to arbitrary code execution
Description: A memory corruption issue was addressed through improved memory handling.
CVE-2016-7705 : Craig Young of Tripwire VERT
Entry added November 30, 2017
Intel Graphics Driver
Available for: OS X El Capitan v10.11 and later
Impact: A malicious application may be able to execute arbitrary code with kernel privileges
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-4633 : Marco Grassi (@marcograss) of KeenLab (@keen_lab), Tencent
IOHIDFamily
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A null pointer dereference was addressed through improved input validation.
CVE-2016-4626 : Stefan Esser of SektionEins
IOSurface
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: A use-after-free was addressed through improved memory management.
CVE-2016-4625 : Ian Beer of Google Project Zero
Kernel
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to execute arbitrary code with kernel privileges
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-1863 : Ian Beer of Google Project Zero
Os X El Captain Keeps Prompting For Updates
CVE-2016-4653 : Ju Zhu of Trend Micro
Vlc for mac os x 10.6. CVE-2016-4582 : Shrek_wzw and Proteas of Qihoo 360 Nirvan Team
Kernel
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to cause a system denial of service
Description: A null pointer dereference was addressed through improved input validation.
CVE-2016-1865 : Marco Grassi (@marcograss) of KeenLab (@keen_lab), Tencent, CESG
Libc
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to cause unexpected application termination or arbitrary code execution
Description: A buffer overflow existed within the 'link_ntoa()' function in linkaddr.c. This issue was addressed through additional bounds checking.
CVE-2016-6559 : Apple
Entry added January 10, 2017
libc++abi
Available for: OS X El Capitan v10.11 and later
Impact: An application may be able to execute arbitrary code with root privileges
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-4621 : an anonymous researcher
libexpat
Available for: OS X El Capitan v10.11 and later
Impact: Processing maliciously crafted XML may lead to unexpected application termination or arbitrary code execution
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-0718 : Gustavo Grieco
LibreSSL
Available for: OS X El Capitan v10.11 and later
Impact: A remote attacker may be able to execute arbitrary code
Description: Multiple issues existed in LibreSSL before 2.2.7. These were addressed by updating LibreSSL to version 2.2.7.
CVE-2016-2108 : Huzaifa Sidhpurwala (Red Hat), Hanno Böck, David Benjamin (Google), Mark Brand and Ian Beer of Google Project Zero
CVE-2016-2109 : Brian Carpenter
libxml2
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
Impact: Multiple vulnerabilities in libxml2
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2015-8317 : Hanno Boeck
CVE-2016-1836 : Wei Lei and Liu Yang of Nanyang Technological University
CVE-2016-4447 : Wei Lei and Liu Yang of Nanyang Technological University
CVE-2016-4448 : Apple
CVE-2016-4483 : Gustavo Grieco
CVE-2016-4614 : Nick Wellnhofer
CVE-2016-4615 : Nick Wellnhofer
CVE-2016-4616 : Michael Paddon
Entry updated June 5, 2017
libxml2
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
Impact: Parsing a maliciously crafted XML document may lead to disclosure of user information
Description: An access issue existed in the parsing of maliciously crafted XML files. This issue was addressed through improved input validation.
CVE-2016-4449 : Kostya Serebryany
libxslt
Available for: OS X Mavericks v10.9.5, OS X Yosemite v10.10.5, and OS X El Capitan v10.11 and later
El Capitan Os X Download
Impact: Multiple vulnerabilities in libxslt
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-1683 : Nicolas Grégoire
CVE-2016-1684 : Nicolas Grégoire
CVE-2016-4607 : Nick Wellnhofer
CVE-2016-4608 : Nicolas Grégoire
CVE-2016-4609 : Nick Wellnhofer
CVE-2016-4610 : Nick Wellnhofer
Entry updated April 11, 2017
Login Window
Available for: OS X El Capitan v10.11 and later
Impact: A malicious application may be able to gain root privileges
Description: A type confusion issue was addressed through improved memory handling.
CVE-2016-4638 : Yubin Fu of Tencent KeenLab working with TrendMicro's Zero Day Initiative
Login Window
Available for: OS X El Capitan v10.11 and later
Impact: A malicious application may be able to execute arbitrary code leading to compromise of user information
Description: A memory corruption issue was addressed through improved input validation.
CVE-2016-4640 : an anonymous researcher working with Trend Micro’s Zero Day Initiative
Entry updated November 16, 2016
Login Window
Available for: OS X El Capitan v10.11 and later
Impact: A malicious application may be able to execute arbitrary code leading to the compromise of user information
Description: A type confusion issue was addressed through improved memory handling.
CVE-2016-4641 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative
Login Window
Available for: OS X El Capitan v10.11 and later
Impact: A local user may be able to cause a denial of service
Description: A memory initialization issue was addressed through improved memory handling.
CVE-2016-4639 : Yubin Fu of Tencent KeenLab working with Trend Micro's Zero Day Initiative
OpenSSL
Available for: OS X El Capitan v10.11 and later
Os X El Capitan Keeps Prompting For Update Mac
Impact: A remote attacker may be able to execute arbitrary code
Description: Multiple issues existed in OpenSSL. These issues were resolved by backporting the fixes from OpenSSL 1.0.2h/1.0.1 to OpenSSL 0.9.8.
CVE-2016-2105 : Guido Vranken
CVE-2016-2106 : Guido Vranken
CVE-2016-2107 : Juraj Somorovsky
CVE-2016-2108 : Huzaifa Sidhpurwala (Red Hat), Hanno Böck, David Benjamin (Google), Mark Brand and Ian Beer of Google Project Zero
CVE-2016-2109 : Brian Carpenter
CVE-2016-2176 : Guido Vranken
QuickTime
Available for: OS X El Capitan v10.11 and later
Impact: Processing a maliciously crafted SGI file may lead to arbitrary code execution
Os X El Capitan Keeps Prompting For Update Windows 7
Description: A memory corruption issue was addressed through improved input validation.
CVE-2016-4601 : Ke Liu of Tencent's Xuanwu Lab
QuickTime
Available for: OS X El Capitan v10.11 and later
Impact: Processing a maliciously crafted Photoshop document may lead to unexpected application termination or arbitrary code execution
Description: A memory corruption issue was addressed through improved input validation.
CVE-2016-4599 : Ke Liu of Tencent's Xuanwu Lab
QuickTime
Available for: OS X El Capitan v10.11 and later
Impact: Processing a maliciously crafted FlashPix Bitmap Image may lead to unexpected application termination or arbitrary code execution
Description: Multiple memory corruption issues were addressed through improved memory handling.
CVE-2016-4596 : Ke Liu of Tencent's Xuanwu Lab
Reinstalling Os X El Capitan Error
CVE-2016-4597 : Ke Liu of Tencent's Xuanwu Lab
CVE-2016-4600 : Ke Liu of Tencent's Xuanwu Lab
CVE-2016-4602 : Ke Liu of Tencent's Xuanwu Lab
QuickTime
Available for: OS X El Capitan v10.11 and later
Impact: Processing a maliciously crafted image may lead to arbitrary code execution
Description: A memory corruption issue was addressed through improved input validation.
CVE-2016-4598 : Ke Liu of Tencent's Xuanwu Lab
Safari Login AutoFill
Reinstall Os X El Capitan Without Apple Id
Available for: OS X El Capitan v10.11 and later
Impact: A user's password may be visible on screen
Description: An issue existed in Safari's password auto-fill. This issue was addressed through improved matching of form fields.
Os X El Capitan Keeps Prompting For Update Firefox
CVE-2016-4595 : Jonathan Lewis from DeARX Services (PTY) LTD
Os X El Capitan Keeps Prompting For Update Pc
Sandbox Profiles
Available for: OS X El Capitan v10.11 and later
Os X El Capitan Keeps Prompting For Update 2017
Impact: A local application may be able to access the process list
Description: An access issue existed with privileged API calls. This issue was addressed through additional restrictions.
CVE-2016-4594 : Stefan Esser of SektionEins
OS X El Capitan v10.11.6 includes the security content of Safari 9.1.2.