I have never encountered this problem for over a year ever since working on premiere pro CS5/ CS5.5
That is strange, because PR needs to be active in order to playback. If it is not in the foreground, it stops playing, because it needs all the resources available and especially on a weak system like an iMAC. If there is no audio, either the source material is no good, the computer is just too slow, or another OE.
I am currently reinstalling the premiere pro, let's see if ti will change or not.
Reinstalling doesn't change a thing. Problem still persists. Even my old CS5 is affected.
I did an update last night Lion 10.7.3, so I am not sure if this is connected or not.
Yes I know that. PLayback will automtically stop once you do something else but the problem is once go back to editing on premiere pro, playback won't even start. Like I sad, I would need to restart the program itself.
Anyway, I've decided to reformat.
I hope Adobe still sees this as a bug or something.
That sounds like whatever else you are doing, is not releasing resources for PrPro.
I just had a similar issue (Mac OS 10.7.3) Premiere Pro CS 5.5.2 was getting very unstable, seemed like it was very sluggish. When I switched to another app, then back to Premiere, pressing Play or spacebar didn't do anything. However if I waited a long time, like a minute, it came back to live. I'm not sure what is going on with my Premiere Pro these days, but it seems like it's gettings slower for me. One thing I do is to use Cocktail to clean the system caches, the reboot, and it seems this temporarily helps Premiere Pro, but after a time it gets boggy again.
Any advice on what to 'clear' to get PPro in an optimized state? I have a relatively older Mac Pro, 8 core but with 24GB of ram and nVidia 4000. It might be my imagination but it seemed 5.0 and 10.6 was faster and more stable than this, but who knows. Any advice is appreciated.
I too am experiencing the exact same thing. Just "Upgraded" (to a bad problem) today. Working between AE and Pr has been a nightmare. What gives????
Running Mac 10.6
I had a similar issue after (I think) monkeying around with the audio settings in Pr 6 - basically trying to get the audio playback on both my cinema display and imac. This fix worked for me.