On a location shoot last Wednesday I had my first chance to tether my 5Dmk3. I tested the night before, which was good (!) because I found I had to update to 2.11 -- so far so good. Software opened and operated camera with no incident the night before, although it was a short test. Length of operation not a factor though as you will see.
On the shoot the first few times I tethered the EOSUtility shut down in a few seconds, often before I even attached the camera. Throughout the day thew sw would shut down in between shots, before shots (during setup) from LiveView and from the control pane, plugged in to AC and on battery... it was FLAKY.
I feel for you Jonathan7007. On both PC and my current Macbook Pro, I have come to accept that EOS Utility will crash and generally behave very badly as a matter of course. For tethered shooting on a PC laptop, I used to use the sensational BreezeBrowser Remote Pro. This is a mature, bulletproof remote shooting program. I just about blessed its existence just about every time I used it. Test drive the demo.
However when I switched to the MBP I discovered that the Mac version of BreezeBrowser Remote Pro is a stripped down version with just a fraction of the functionality of the PC version. So it was in an atmosphere of annoyed frustration that I reverted to the very flaky EOS Utility. For this reason alone my next laptop will be another PC. Communications with BB suggest no intention of bringing the Mac version up to the functionality level of the PC version.
Is there any other highly regarded remote shooting utility out there worth trialling?