To update this application, sign in to the account you used to purchase it.
I am signed into my account, and I can see that I purchased Mountain Lion, but the App Store refuses to allow me to re-download it.
"To update this application, sign in to the account you used to purchase it."
The 10.84 update screwed up my installation, forcing me to do a complete rebuild. YES I had already fixed permissions before running the update, as well as running fixes through Disk Warrior beforehand. Re-installing all my apps takes a couple of days -- it's over 6 hours straight for Native Instruments Komplete 9 (12 dual-layer DVD's). I'm frustrated and I just want to download the latest OS X 10.8.4 installer so I can install fresh. I've been down for 2 weeks because of this garbage.
To my knowledge, I only have one existing Apple account: I merged all my accounts several years ago when I stopped working for an Apple VAR.
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Mac Pro, Mac OS X (10.7.4), 2x 2.66ghz, 4gb RAM, 1TB 7200rpm hd