issues with global macro windows code on mac

I am trying to use a Master do file that someone has sent me from their windows computer. I have a Mac and the project that was sent to me was based on a global macro, used to change to and from directories.

Code:

gl MP "/Users/Cassie/Desktop/data/Jared_Data"

    cd "$MP/Replication_Files/Management/Master"

unable to change to /Users/Cassie/Desktop/data/Jared_Data/Replication_Files/Management/Ma
> ster
r(170);

end of do-file

The global MP is meant to be the master path for the project. To run the master management file, I have to change to the master management folder.

I suspect that this is because there's a slight software difference between windows and Mac, any ideas what the problem might be?