Click Reinstall macOS and wait for macOS Catalina to be installed on your machine. Your Mac should then open in Recovery mode. Select the bootable installer and click Enter. Restart your Mac while holding Option/Alt (depending on when it was made) to access Startup Manager. Solves a problem that can prevent parental control accounts from saving settings. The upgrade to OS X El Capitan v10.11.6 enhances your Mac's reliability, performance and protection and is advised for all users.
For OS X El Capitan users this update is recommended.
How do I install the latest version of OSX on an old MacBook? El Capitan 10.11.6 is now released as the latest version of Download El Capitan. Check the Log screen to see if files are being installed. Go to System Preferences > Software Update. If you’re positive that the Mac isn’t still working on updating your software then run through the following steps: Shut down, wait a few seconds, then restart your Mac. The backup includes docker files, npm packages, your personal files etc.
It excludes log files, Spotlight indexes, caches, temporary files and trash (have a look: On OS X, what files are excluded by rule from a Time Machine backup?). If you have an older Mac and you would like to load Mac OS X 10.11 El Capitan on it, it can be a challenge to find and download it from the Mac App Store.In. Time Machine by default backs up nearly everything in your macOS partition. The downgrade requires wiping your Mac’s primary drive and reinstalling MacOS Mojave using an external drive. You can back up with the built-in Time Machine, although you must be careful if you use this option. To ensure you don’t end up missing anything, your best bet is to back up your entire hard drive. No matter which way you downgrade your macOS version, you’ll erase everything on your hard drive. Does downgrading macOS delete everything?
You may need to restart your Mac for the update to take effect. Launch the App Store from the dock and click on the “Updates” tab. You must apply operating system updates via the Mac App Store. If you don’t see a “Software Update” option in the System Preferences window, you have macOS 10.13 or earlier installed. Why can’t I find software update on my Mac? Your Mac will restart once the installation is complete. Select your startup disk and click Install. The easiest way is to go to Apple’s Support page and then do a spotlight search for the macOS or OS X version you want. Click Continue and follow the on-screen instructions. Once you see the macOS Utilities screen choose the Reinstall macOS option. Here are the steps Apple describes: Start up your Mac pressing Shift-Option/Alt-Command-R. How do I make sure my Mac is backed up to iCloud?.How do I install the latest version of OSX on an old MacBook?.Does downgrading macOS delete everything?.Why can’t I find software update on my Mac?.
Can I still download macOS High Sierra?.How do I update my Mac when it says no updates available?.How do you make sure your Mac is backed up?.How do I get an older version of macOS X?.