I have a windows pc and use photoshop CS5 extended. I make templates for photographers to use for their clients and need to know if I save the file on my pc as a psd, jpg, png or tiff with layers, will someone who uses a mac be able to open and use these templates. Would I need to do something when I save them to make sure they work on both operating systems. If I try to open a psd that was saved on a mac on my pc it says it is not compatable with photoshop. I thought that they were now compatable on both operating systems. Very confused.