hi, I. need to upgrade from 10.6. 13 to 10.6.15 how do I go about that? it is Sierra high
Hi I need to upgrade form High Sierra 10.13.6 to 10.15 how do I do that? many thanks
MacBook Air 13″, macOS 10.13
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Using Safari only, visit How to get old versions of macOS, and determine your MacBookAir hardware compatibility with Catalina, and if it is, there is a link to Catalina 10.15.7 in the Mac App Store.
Because Catalina only supports 64-bit applications, you should check which 32-bit software you have installed now by running the free Go64 application. You should also verify with your printer/scanner and third-party software vendors that they offer product support on Catalina.
Before you upgrade to Catalina, ensure that you make one last Time Machine backup.