I depends on what you do. If you don't use multiprojection, and that you use only one graphic card with 1 output for your preview, and the 2nd output of your graphic card for your beamer, there should be no pb and so you can upgrade to quicktime 7.3.
If you use at least 2 graphic cards, then for now, this is what i know :
- QT7.3 unenable multiprojection on mac pro with M8 as far as you use at least 2 graphic cards, so at least 3 output (your preview + 2 screens) with photojpeg codec files. Some other codecs run but photojpeg is for me the smoother one and all my loops are in photojpeg.
So for multiprojection on mac pro with at least 2 graphic cards:
- M8 V2.5.4 works with QT 7.1.3
- M8 V2.5.5 BETA works with QT 7.2
The 2 last QT update brought pbs on multiprojection, i hope once M8 V2.5.5 will work with QT 7.3, then other QT updates won't bring the same pb each time (i repeat, only on mac pro with at least 2 graphic cards. I know it works on a laptop with dual or triple head, but it's not the topic here)
So before you update, make a back up copy of your actual system, very useful these days of QT upgrades!!!