I'm wondering how I can make my RAW files visible in CS4. I'm using the new iMac 10.8.3. Everything worked well in Tiger.
For 7D you need adobe camera raw 5.6 and for 5D III you need 6.7 or 7.1. So with this you should be able to view the 7D but to view the 5DIII you need and upgrade to CS6 or download the free DNG converter.
Canon 7D and 5D III
I believe you mean that only some files appear as 'exec', just a rounded rectangle icon with grey gradient and top left corn in green 'EXEC', the file extension shows '.CTG'. This is the file that sorts stuff on the CF card and you can safely delete this or simply ignore once the files have been imported on your computer.
If you check the file size of this icon you will see it has only a couple of 100 bytes, depending on the amount of files you have shot on one day or session so not even 1 kb while your Raw files will probably are around 15 or 20 MB in file size