TabView for Mac OS X
TabView 2.x and future updates will be released on the Mac App Store only, requiring an Intel Mac with OS X 10.6 or later. Licenses for the 1.x series won't work with the new 2.x releases. If you cannot (or wish not to) access the Mac App Store, you'll still be able to download and buy version 1.39, though it won't be upgradable:
If viewing PowerTab files is not enough for your needs, if you wish to be able to edit or create them, you might wish to try Tablatures instead.