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Fixing “files in the Adobe Application Support folder… are missing” error in Photoshop

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Recently Adobe Photoshop CC 2014 on a computer I maintain started displaying this error each time it was started. Photoshop would still run, and the user could see no obvious effects from this error. But it was disconcerting and a bit of a nuisance to be presented with it each time they started Photoshop. Reinstalling Photoshop, as the error suggested to do, would be a relatively easy fix. But there may be an even easier one. I don’t imagine this issue affects many Photoshop users. Yet, in case someone else is looking to resolve it, here’s the answer.

The full error message was:

One or more files in the Adobe Application Support folder, necessary for running Photoshop, are missing. Please run the Photoshop installer and re-install Photoshop

The solution to this problem was as simple as copying the Adobe Unit Types.osax file from a system folder on a previous OS X installation, into the [main hdd]/Library/ScriptAdditions folder. The computer in question had been recently upgrade from an earlier version of OS X to Yosemite. The hard drive was replaced (upgrade to a bigger one) at the same time. It would seem this error may have started after the migration of the data from the old OS X installation (on the original drive) to the new OS X installation. So, obviously you’ll need to have an older /Library directory, and it’s contents, kicking around on a drive somewhere.

If you don’t, and  you can’t be bother doing a full reinstall of Photoshop, a copy of that file is attached to this post. In case you’re concerned about the file and what it does: The file itself serves a fairly basic function. So basic, in fact, that Photoshop happily runs without it. As far as I can tell, it’s related to the units used in Photoshop (e.g. cmtr, inch, kmtr, mile, yard, etc.). Below is a screenshot of the plist file within the Adobe Type Units.osax package.

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You can download the file here. You’ll need to unzip it before moving the .osax file into the location indicated above.

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