PDF Macro works with windows but not on macs

I've sent the file to 2 different windows computers and it works fine, but doesn't work with the two macs that I've sent it to.

This is the code:

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Thanks.

How does it not work?

One thing I notice is that you are using '\' for the path separator, that's Windows specific.

Try changing to Application.PathSeparator.

PS Can you add code tags when posting code?