Mac and Windows versions are identical in every feature. The only difference is the availability of certain QuickTime or AVI codecs that are unique to the particular OS.
Are you referring to blend modes? If that's what you're looking for then press F4 to change the switches column in the timeline to the mol to change the switches collumn. You can also click on the second icon from the left at the bottom of the timeline to show both columns at the same time.
Thanks Rick... no, what I'm referring to are compositing options described here http://blogs.adobe.com/aftereffects/2015/08/compositing-options-effect-masks.html
that allow you to select a mask to limit the image area an effect has... I know that there are was of doing this with adjustment layers etc... this method as described is far more elegant and requires less layers and nesting... it's weird that those options are not on the mac... the images in the above link are different to the effect editing window I get when I apply the same effect.. cheers Pete
ahh.. just worked it out... didn't read the thing correctly... they're in the timeline panel.... not the effect editor.... problem solved... cheers all...