Apple
can't download catalina app store
install macOS Catalina old macs
This version of macOS cannot be installed
we could not complete your purchase catalina 10.15.5
This version of macOS [10.15/10.14] cannot be installed on this computer
Some might see an error “This version of macOS 10.15.5 (Catalina) 10.14.6 (Mojave) cannot be installed on this computer” while downloading OS updates…