Dark Images Mac to PC

Cross-Platform Issue. When I adjust images on my Mac and send to a PC for viewing, they are sometimes too dark. I have modified my "color settings" in "working spaces" and created a profile in PS6 which boosts the gamma to 3.00. This helps a little, any suggestions to be able to (temporally) change or filter the Mac view to better estimate the PC final product?

There is a preview option - I think it is View>preview> and then choose "Windows RGB"

This is the biult in photoshop of previewing for the Windows platform.

By the way you do realise YOU WILL GO TO HELL for using a PC?

Changing the view did about the same as changing the working space. It's close, but I still need to tweak. Thanks for the suggestion.

Thou speaketh light amidst the darkness. Yet we must appease the masses, lest they realize their own mortality.