How to enable second processor on Power Mac G5 Dual 1.8GHz using terminal

Question

How to enable second processor on Power Mac G5 Dual 1.8GHz using terminal

The title says it. What had happened was I used the Processor Pref Pane but now its gone. and Im using iStat Menus and Its only reading 1 Processor. =/ I have heard somewhere that you can use Terminal to enable/disable the second processor. (btw I went to Macintosh HD/System/Library/Core Services/Menu Extras/CPU.menu and it doesnt show up in the menu bar. Also the Processor Pref Pane is gone. TIA.

Regards

eMac, Power Mac G5, 16GB (PRODUCT) RED 4th Gen nano, 160GB Black iPod Classic 09, Mac OS X (10.5.8), eMac:900MHz:1GB:500GB:AP:BT:SD:Leo PowerMac G5:Dual 1.8GHz:4GB:4TB:APE:BT:SD:Leo

Posted on Aug 6, 2010 10:23 PM

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Answer 1

Best reply

BDAqua

Level 10

239,369 points

Aug 6, 2010 11:06 PM in response to Matthew Knice

Hi there, try this...

Boot into Open Firmware by holding down Cmd-Opt-O-F

At the prompt "0 >" type

setenv boot-args cpus=2

Then Type

mac-boot

Enter.

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Answer 2

japamac

Level 7

24,400 points

Aug 7, 2010 4:50 AM in response to Matthew Knice

Hi-

While booted normally, in Utilities, open Terminal and enter the following:

$ sudo nvram boot-args="cpus=1" to disable
To re-enable the 2nd cpu *$ sudo nvram boot-args=""*

To get the Processor Pref Pane back, download CHUD.
Run the deinstaller, and then install.
The Pref pane should then be there in System Preferences.

Download CHUD here:
http://www.versiontracker.com/dyn/moreinfo/mac/14358

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