Logic 9 users beware of upgrade!

[Muso75]

Do not upgrade to Logic 9.1.2 if you're running a quad-core Nehelem Mac Pro or iMac. Apparently it cuts the performance in half. Insane!

http://www.gearslutz.com/board/music-computers/540098-logic-9-1-2-a.html

[seisend]

Thanks, very interesting.

I've already updated my Mac Pro 8 Core but didn't tested it yet. I am curious if it affects my machine, too ! Would be very disappointing....

Are 09 Quad Cores the only machines affected yet?

[Queso]

Does this affect the Logic Express update too?

[Ritsuka]

HyperThreading can help, but it's not exactly a 2x speed up in any way. So I find those reports a little odd.

[qawes]

Does this affect the Logic Express update too?

As far as I heard, it's the same thing.

[aliensporebomb]

Fix for 9.12.

Open terminal:

Enter this string:
defaults write com.apple.logic.pro MD_AllowVirtualCores -bool yes

Your hyperthreading is re-enabled.

On my Corei7 2.8 ghz iMac I went from 61 tracks with HT with 9.11 to a pitiful 30 tracks!

With 9.12 and the fix I went to 70 tracks!

This is using the Evan benchmark where every track has a space designer and exs1 instrument. Overkill I know. No real session would ever have that.

At any rate, there you go.

[mannix87]

thanks for the heads up. will hold off on any upgrade in the meantime.