I bought Premiere 10 for the Mac. I wanted more themes etc so I upgraded to plus membership. I have not been able to get any plus content. I uninstalled and reloaded after I had upgraded to plus membership, no change. I have verified that my account says plus membership. Any ideas?
You should contact Tech Support at Photoshop.com. They're very responsive and very helpful.
But, assuming you're logged into the site when you start the program and you've got an always-on internet connection, the Plus content appears on the Mac just as it does on the PC -- right in the program, but with a little yellow banner over the upper right corner.
They're most easy to spot in the Themes and Disc Templates.
BTW, what kinds of additional content are you looking for? Custom-designed DVD and BluRay themes can be found on sites like http://Muvipix.com, often for free.