Thread: Mac App Store
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Quote:
Originally Posted by Brian View Post
Folks may find this blog post from Ken helpful.

In a nutshell, the Mac App Store will sometimes detect that applications it sells are installed, but that doesn't mean they get handled the same as ones purchased through the store.

For example: the 'installed but not purchased' applications will not be auto-updated, and if the version number changes on either side, the "installed" button reverts to a "buy" button.
Wonder if this won't change in near future..