Chrome on MacOS was affected as well, yeah. Note that we don't know if attackers exploited the bug on platforms other than iOS, but its certainly possible that they did (I'd argue even probable).

MacOS is affected. Sadly there hasn't been much coverage on this...

Also for corporate users this is a pain as you have to update Safari via Software Update unlike browsers like Chrome which automatically update.

Safari:

https://support.apple.com/en-us/HT213930

MacOS:

https://support.apple.com/en-us/HT213906

https://support.apple.com/en-us/HT213915

https://support.apple.com/en-us/HT213914