Application.OperatingSystem Property (Excel)
Returns the name and version number of the current operating system — for example, "Windows (32-bit) 4.00" or "Macintosh 7.00". Read-only String.
Syntax
expression .OperatingSystem
expression A variable that represents an Application object.
Example
This example displays the name of the operating system.
MsgBox "Microsoft Excel is using " & Application.OperatingSystem