Sometimes as a developer you want to be sure that the Mac your VBA code is running on have the correct MacOS version installed so your code is working correct. With the macro example below you can test the MacOS version.

Mac OS X 10.0 Cheetah
Mac OS X 10.1 Puma
Mac OS X 10.2 Jaguar
Mac OS X 10.3 Panther
Mac OS X 10.4 Tiger
Mac OS X 10.5 Leopard
Mac OS X 10.6 Snow Leopard
Mac OS X 10.7 Lion
OS X 10.8 Mountain Lion
OS X 10.9 Mavericks
OS X 10.10 Yosemite
OS X 10.11 El Capitan
MacOs 10.12 Sierra
MacOs 10.13 High Sierra
MacOs 10.14 Mojave
MacOs 10.15 Catalina
MacOs 11.? Big Sur
MacOs 12.? Monterey
MacOs 13.? Ventura

In the Mac Office 2016 version they changed the string that is returned by Application.OperatingSystem so I looked for another solution that is working in Office. The macro example below I test if Catalina or higher is installed on your Mac.

Application.OperatingSystem returns for example a string like this for an Intel Mac : Macintosh (Intel) Version 12.6 (Build 21G115). And this for a M1 Mac : Macintosh (ARM) Version 12.5 (Build 21G72). The macro below will give you arm64 on the M1 and x86_64 on the Intel Mac so it is easier to test because there are no version and build numbers in the string.