I rarely use by mac. Right now I wanted to install a new program on it but it says it won't run unless the OS is 10.12. I only have 10.11.6 (El Capitan) right now and I can't see any updates for upgrading it to 10.12.
Questions:
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How can I force upgrade it to 10.12? I can't see any updates for it in the store to upgrade it to 10.12. When I Googled, The only one I can find that has a 10.12 is Mojave.
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If I upgrade my OS to 10.12 will it erase all my previously installed apps and programs? I don't want to do it all again.
Best Answer
How to upgrade to macOS Sierra - Apple Support will lead you to the Mac App Store link for Sierra.
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Download Older Versions of macOS and Mac OS X - krypted