possibly getting system variable
@GetMachineInfo allows you to get OS System
variables using the keyword : SysEnvVariable
You can use this to see if the system is Windows. I
tried doing below on my Windows 7 machine:
@Prompt([Ok];@GetMachineInfo([SysEnvVariable];"OS");"title")
got the result as "Windows_NT".
Not sure what environment variable should be checked on the Mac system,
but you can possibly experiment.