On or about 22 June 2012 Plugin Alliance released an update for all plugins which fixed the AU lag issue.
So make sure you have those versions installed.
No... Given that the graphics card you just mentioned is written correctly, it's not unreasonable; it's unsupported hardware for running OS X what so ever...
And, looking at your profile and seeing you have a MacBook Pro listed, I can't imagine how much sticky tack and swiss army knives was needed to fit it... Don't think you might've broken something in the process?
To be fair, and on the point, all threads I've seen (elsewhere) about placing any of the newer Radeons, the 6000-series or newer, in a Mac Pro has been pretty much a failure, with bad performance and lack of hardware acceleration being the most common result.
The only plugin that ever gave me the symilar symptom on SL was Toxic Biohazard from Image-Line. The GUI would lock up quite badly after a while. I just tried it on ML and I can get the lock up with a fresh project, one plugin, as soon as I change anything on the plugin GUI ! It's worse than channel EQ by far.
I guess this suggests it's something common to both OS versions, but the effects are far more dramatic on SL.
I don't know if anyone else gets this issue with Toxic Biohazard, but could be a good one for developers to re-create the issue.
You realize some people have multiple Macs, but the forum profile only shows one, right? And also that people don't always update their forum profiles to brag about their latest and greatest hardware?
Also, aftermarket cards exist, and are supported by OSX, even if Apple doesn't ship computers with them.
Yes, indeed (to all of the points, Fluffy).
Which is why I do mention that the places discussing putting any of the newer Radeons in a Mac Pro seem to constantly come to the conclusion that it is currently a bad idea...
If I were to make a upgrade, I'd at least stick with a card that is known to have drivers working for the OS, before starting to complain about lag. Especially when all reports indicate that hardware acceleration with your card is non existant.
But if it laggs hard on radeon HD7999 4GB vram - thats unreasonable ! I would accept if CPU was at limit, or RAM maxed out, or video system cant handle it, but SSD, 8 cores , 16 gig and 1gb 6750 is MORE than enought to handle it.
Btw the whole video system of logic seems to be outdated. Yeasterday i was making soundtrack for one parkour video, and logic was choking from 5 min 720p video in my project, while i tried to write some sound. I think whole story is about bad video handling code or something. With GPU like that it must be smooth like a motherlover =) Or Ram , cuz i was getting system overloads and disk issues every minute till i opened logic in 64bits.
Well that makes sense in a way, Logic running in 32 bits is limited to a little under 3.5GB of RAM, doesn't matter how much RAM you have Logic won't see or use it until you run Logic at 64-bit. Doesn't matter if the OS kernel is 32 or 64-bit.
Graphics card brand should not matter what so ever, intel/nvidia/amd should all work just nicely, and be equally snappy, as long as its part of your original spec. I'm more trying to say that if you decide to mix and match and exchange hardware components in the computer, especially when not getting parts listed by Apple, then you need to do your research to get hardware that is compatible (hence the pointer to modern radeon cards as bad things, as nvidias latest cards seems to have quite a lot less issues when put in a Mac Pro).
Once again I'm side tracking, which so far is all I've managed to do in this thread, so I'll just make sure to keep quiet now and wait with anticipation for others' findings.
Just got off the phone with Apple Support.
Good news, this issue has been replicated on their end and is now with their engineering in escalated status (before my call, so they are working on this).
So expect an impending update. Hoooopefully soon.
I have to be fair and add: the tech I spoke with was unbelieveable, 200% Courteous, friendly, and knowledgeable. He went out of his way in that he actually consulted colleagues and called me back with another possible solution to another problem I was having, and solved it.
We can say all we want and complain about updates and bugs, but I have never had a tech support experience as nice as Apple's.
I also spoke to a member of the Executive Relations team after emailing Tim Cook, and gave a detailed description of the issue. I also explained the effects of installing a different version of Pro-Kit from the one installed with ML (7.3) that users have been experiencing.
They're going to be forwarded over to support to investigate so hopefully a resolution will surface soon.
This is great news. Especially since the ProKit downgrade is a buggy fix (Don't do it if you're considering it). Progress bars only display half the bar, windows have white backgrounds, audio stops randomly, and 32 Logic won't even launch for me. I've gone back to the current ProKit, awaiting a fix from Apple.
I have a FIX for the lag issue. Don t know if it was mentioned already here.....
Tested it for two hours and it works on my 8core with ML 10.8.0 Logic 9.1.7
When logic is unresponsive.......right click on it s icaon in the dock. Then select the current project: "name- arr "
just above "options". Voila. Logic is back. Responds fine again. :-)
I can live with the lag issue now...just one mouse movement and it is gone
....so I am not going back to my SL clone. :-)