Software issue

I have recently had a problem downloading images from my G12. I am running OS10.9.5 on my Mac and the latest Canon software and when I connect the G12 to the computer Canon Camera Window launches but immediately quits. I have been relegated to putting the SD card in my 1DsIII and using EOS Utility to download. I am curious if others have had the same experience and if you've found a workaround.

I have not had that particular issue, although on my Windows Vista machine one of the Canon photo programs does close itself (the image downloads from SD Card work fine, so I just use a non-Canon photo viewer/optimizer).

You might try Uninstalling the canon programs, shutting-down/restarting, and then reinstalling the Canon programs again. (On Windows PCs, sometimes the Windows OS updates mildly break an application).

Good luck.

A very old experience: some years ago, an attempt to install ZoomBrowser in a drive other than the C:\ directories was a reason enough for spectacular crashes.
Now, Zoombrowser lives in the Program Files zone and sparingly it silently quits working and closes, no harm done to other sections/programs.
I have a Windows XP in spanish that may contribute to the Zoombrowser misbehavior.