Mac Apps Store wont download any apps on computer

I'm not sure why this worked, but I just downloaded the apps through the app store on a different Mac, then copied them over to the problematic Mac. Since then, there have been other updates applied with no problem. I'm not sure what the problem here was.

An install on Mac OS is generally just copying the relevant files into place. Usually, you'll be able to copy an app's bundle over from one machine to the other. The only thing is that the App Store will have some sort of DRM, so just copying it may not work. I suspect that the answer is no, because you'll need to sign in to the App Store, but I haven't tried it. (On the other hand, I've installed Lion on a Leopard machine via a disk without Sow Leopard.) Additionally, Apps that are downloaded from the Mac App store will carry minimum system requirements that might prevent them from running altogether, even if you theoretically circumvented the DRM from the App Store.