Mac App Store: 32 Bit vs. 64 Bit

Yesterday, I had some trouble downloading apps from the Mac App Store, amongst them the very highly rated Alfred:

Word is now that some apps on the App Store are compiled only with support for 64 bit machines. Makes sense, right? The App Store is Snow Leopard only, Snow Leopard only supports Intel Macs, and all Intel Macs are 64 bit, right?

Not so fast! A few Intel machines did in fact ship with 32 bit Core Duo or Core Solo chips, including early iMacs, early Mac Minis and early MacBook Pros like mine.

Now I can’t be sure that this is the exact problem I’m experiencing with Alfred (though I hope it is, since it’s very easy for the developer to fix), but it’s something to keep in mind if you are experiencing troubles on an older Intel machine.

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