Update os x el capitan to 10.12
It is recommended to make backups of any important data beforehand. After installing and using OS X El Capitan on the MacBook, a Mac Pro and the older 13-inch MacBook Pro Retina we are impressed with the overall performance and new features of OS X 10.11 update.
UPDATE OS X EL CAPITAN TO 10.12 DRIVERS
Note: When updating to a new operating system, make sure that all of your third-party plug-ins, hardware drivers and other software programs are officially supported. I only have 4GB though so cant seem to use these patches. Step 4 Press the 'Continue' button and wait for the installation to begin. Step 3 Once the download is done, the El Capitan installer will pop up on your screen.
UPDATE OS X EL CAPITAN TO 10.12 UPDATE
You can use dosdude1’s patch (just google it) to go as high as Catalina but I wouldn’t unless it’s a decent spec model with at least 8GB. Download OS X El Capitan 10.11.4 update Step 2 From the official El Capitan page, you can download your required version. Improves the stability of Terminal app. El Capitan is the latest OS your iMac will run natively.Fixes an issue that causes Xsan clients to unexpectedly restart when moving a file within a relation point on a Quantum StorNext File System.Resolves an issue that prevents making certain SMB connections from the Finder.MacOS 10.12.4 is an update to macOS 10.12 (Sierra) that was released by Apple on July 19, 2017. How do I upgrade from El Capitan to 10.11 6 Click on the top left of your screen click on About This Mac to find out the year of your mac.