Download damaged
I was trying to upgrade my operating system from Yosemite to High Sierra and was told the
upgrade was damaged. I would like to try Catalina. Need a link.
Question marked as
Here is an Apple article with instructions for creating a bootable macOS USB installer which also contains links to various macOS installers:
https://support.apple.com/en-us/HT201372
Just make sure your Mac is able to run Catalina and realize that Catalina no longer supports 32 bit apps.
I recommend creating a bootable macOS USB installer so you have more options in case something goes wrong.
Make sure to have a good backup before attempting to upgrade macOS.