There is no difference between using Mendeley on Mac or PC. The difference lies in citation program Cite-o-Matic to Word. It looks slightly different on the Mac where Cite-o-Matic is a toolbar instead of a tab
If Cite-o-Matic toolbar does not appear in Word, it can always be found here:
Go to View - Toolbars - Mendeley Toolbar
Toolbar settles (usually) at the top - it may be difficult to spot
