Latest macOS version

The latest Mac OS is 10.15.3 (Catalina), released Tuesday, January 28th, 2020. If you have upgraded to 10.15 or 10.15.1 or 10.15.2 already, get the 10.15.3 update. (Remember that 10.15 is a significant upgrade and you should be sure that your apps are ready for it.) See this article for information about compatibility with 10.15.

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How to install macOS Mojave or High Sierra or Sierra when Apple says your installer is damaged

Installing Sierra or High Sierra or Mojave on a Mac? Seeing a message that your installer is damaged? The message is wrong. Here's the fix.

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