Late 2013 mac how to update to 10.15.0
I need ver 10.15.0 to run some of the apps, yet the app store only had updates to 10.11.6.
iMac 21.5″, OS X 10.11
Back up your data, check the application compatibility table, click here, and then on the download link for Catalina. It's a full-version upgrade and won't appear in the Updates list.
Catalina and higher won't run 32-bit software; if you upgrade to one of them, use Go64 as well.
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