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Apple releases fix for Mac Pro audio-based performance issues

post #1 of 12
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Apple Thursday afternoon released a fix for an issue that would significantly decrease the performance of 2009-era Mac Pros with Nehalem-based Intel Xeon processors.

The issue, well-publicized just over a week ago, caused a 20 percent performance hit when playing audio in Mac OS X. Playing audio through iTunes or a number of other applications could also cause CPU temperatures to double.

To address the problem, Apple released "Mac Pro Audio Update 1.0." The 1.64MB update, available for download from Apple, requires Mac OS X 10.6.2 or later.

While previous reports claimed the issue applied to Mac Pros released in both early and late 2009, Apple said Thursday's update was for desktop systems released in the first half of the year. The update reportedly reduces processor utilization during audio activities, such as playing or recording music.

Various user test found that running Windows 7 via Boot Camp eliminated the issue, leading some to believe the issue is related to power management kernel extensions in Mac OS X.

Apple's Mac Pros with Intel Xeon processors based on the Nehalem architecture were introduced in March 2009. in December, Apple added a 3.33GHz quad-core option.

Recent reports have suggested Intel's new six-core "Gulftown" processor could be headed to the Mac Pro in a future upgrade. Apple could stick with the workstation-focused Xeon line of chips, though some rumors have suggested Apple could switch to the new Core i7-980X processor, based on the same architecture.
post #2 of 12
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Originally Posted by AppleInsider View Post

Recent reports have suggested Intel's new six-core "Gulftown" processor could be headed to the Mac Pro in a future upgrade. Apple could stick with the workstation-focused Xeon line of chips, though some rumors have suggested Apple could switch to the new Core i7-980X processor, based on the same architecture.

Wouldn't the upcoming 8-core Nehalem-EX be a much better fit for the next gen Mac Pro? Intel says it has already shipped the chip to system makers, who should be shipping to customers this quarter.
post #3 of 12
That was quick.
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post #4 of 12
Quote:
Originally Posted by AppleInsider View Post

The issue, well-publicized just over a week ago, caused a 20 percent performance hit when playing audio in Mac OS X. Playing audio through iTunes or a number of other applications could also cause CPU temperatures to double.


I'm suspecting this issue is because of Snow Leopard and Grand Central, does it also occur in Leopard?


I don't know what it is about Apple with their "Pro" towers and audio issues, my PowerMac G5 dual processor had all kinds of feedback from the audio channel and that insistent beeping with NAP mode was quite a royal pain in the @ss.

Very fast machine though for the time, like two fast computers in one box, very impressive.
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post #5 of 12
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Originally Posted by macshark View Post

Wouldn't the upcoming 8-core Nehalem-EX be a much better fit for the next gen Mac Pro? Intel says it has already shipped the chip to system makers, who should be shipping to customers this quarter.

No. As an MP-processor, it's far too expensive for a simple dual socket system.
post #6 of 12
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Originally Posted by MacTripper View Post

I'm suspecting this issue is because of Snow Leopard and Grand Central, does it also occur in Leopard?

"While the update addresses the problem for users running Snow Leopard, several Leopard users have reported similar issues. " (Mac Pro update reduces CPU power consumption" MacNN February 11, 2010)

So this was not just a Snow Leopard problem.
post #7 of 12
I'll stick with my Powerlogix upgraded Cube thanks....now excuse me, I'm off to play some Baldur's Gate on OS 9.
post #8 of 12
Quote:
Originally Posted by MacTripper View Post

I'm suspecting this issue is because of Snow Leopard and Grand Central, does it also occur in Leopard?


I don't know what it is about Apple with their "Pro" towers and audio issues, my PowerMac G5 dual processor had all kinds of feedback from the audio channel and that insistent beeping with NAP mode was quite a royal pain in the @ss.

Very fast machine though for the time, like two fast computers in one box, very impressive.

Quote:
Originally Posted by Maximara View Post

"While the update addresses the problem for users running Snow Leopard, several Leopard users have reported similar issues. " (Mac Pro update reduces CPU power consumption" MacNN February 11, 2010)

So this was not just a Snow Leopard problem.

Ok this sucks for me. I'm stuck on Leopard on my 8 core 2.66 because there isn't a full blown PHP package I can install for all the modules and can't afford the downtime to manually install everything. So I'm stuck on a machine that is constantly running at 58* celsius running leopard. Thanks apple. So much for support on your 2 year old OS.

 

 

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post #9 of 12
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Originally Posted by emig647 View Post

Ok this sucks for me. I'm stuck on Leopard on my 8 core 2.66 because there isn't a full blown PHP package I can install for all the modules and can't afford the downtime to manually install everything. So I'm stuck on a machine that is constantly running at 58* celsius running leopard. Thanks apple. So much for support on your 2 year old OS.

Hey, you can't say you weren't warned over and over as they did the same thing to customers with other products. You've just got to remember that they dropped the 'Computer' from the name for a reason. Nobody expects product support for a fashion accessory.
post #10 of 12
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Originally Posted by Amdahl View Post

Hey, you can't say you weren't warned over and over as they did the same thing to customers with other products. You've just got to remember that they dropped the 'Computer' from the name for a reason. Nobody expects product support for a fashion accessory.

Bad troll. No donut.
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post #11 of 12
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Originally Posted by emig647 View Post

Ok this sucks for me. I'm stuck on Leopard on my 8 core 2.66 because there isn't a full blown PHP package I can install for all the modules and can't afford the downtime to manually install everything. So I'm stuck on a machine that is constantly running at 58* celsius running leopard. Thanks apple. So much for support on your 2 year old OS.

This was posted over in the MacRumors thread. Don't know if it's any help to you, but check it out.

http://forums.macrumors.com/showpost...7&postcount=19
post #12 of 12
Quote:
Originally Posted by DMThomas View Post

This was posted over in the MacRumors thread. Don't know if it's any help to you, but check it out.

http://forums.macrumors.com/showpost...7&postcount=19

I'll give it a shot..... thanks!

EDIT: It didn't work. Good thing I backed up my kexts and got the old ones back on. I lost all my sound.

 

 

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The reason why they are analysts is because they failed at running businesses.

 

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