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CHUD Tools 3.5.2

Game screenshot
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Year released:
[www].se [ftp].se [mirror].us [mirror].de (21.20 MB)
MD5: f30ddf23543dafd9a0c8917454d09063
For Mac OS X
[www].se [ftp].se [mirror].us [mirror].de (53.59 KB)
MD5: d4304527a168dfb4ce102e122deeb873
For Mac OS X
Guides on emulating older applications

Available only to registered hardware & software developers, Apple's Computer Hardware Understanding Developer Tools (CHUD Tools) were designed to allow you to effectively measure and optimize the performance of PowerPC Mac systems running Mac OS X.

This is basically a must-have for you, if you have a dual CPU Macintosh as it enables "napping". Enable Nap allows the processors to coast when not under heavy load which can decrease temp by 20F degrees without loss of performance.

Note: This feature is enabled by default on single processor machines, so is not needed.

1st download: CHUD Tools 3.5.2
2nd download: An AppleScript that automatically enables Nap at startup on dual processor MDD machines. Doesn't work with OS X 10.5 Leopard. (see included readme for details)

Architecture: PPC

Requires Mac OS X 10.2 or later.


jpritch's picture
by jpritch - 2020, December 9 - 10:01pm

I extracted to my G4 MDD, I can see the tools in the Developer Directory, but I can't find the Processor preference Panel/app anywhere?
I'm on PPC G4 MDD, dual 1.25GHz and Tiger

Any help would be great!

OpenSourceMac's picture
by OpenSourceMac - 2020, October 4 - 8:01pm

This works fine in Tiger, but if you choose single processor and nap mode, you have to be very careful NOT to put the machine to sleep. If you do, the 2nd processor will come back online after waking and nap mode, combined with multiple processors can lead to serious data corruption (from Apple's own docs). I wrote an Applescript that checks if a Dual-Processor + nap state occurs and if it does, it shuts down the 2nd processor. Without this type of fix, CHUD can be dangerous.

AssortedSordid's picture
by AssortedSordid - 2020, October 4 - 3:12am

I don't understand
Works fine on my Macintosh
I love a haiku.

SkyCapt's picture
by SkyCapt - 2020, May 21 - 1:10am

This is not for Tiger nor Leopard. It allows you to install it, then it feeds a few gremlins after midnight (gmt). Tiger and Leo need suite v4.0 or greater.

Another error in the description, Nap mode is never enabled by default even on 1CPU systems. Specific versions of OS 9 and OS X extensions will enable Nap, but if you run AHT, Open Firmware, or just sit there at the Multi-boot or OF Password prompts, then Nap mode doesn't become enabled and you are frying your machine in a wok.

kms's picture
by kms - 2020, May 20 - 12:59pm

same here, constant disk activity, anyone knows what's actually going on?

SkyCapt's picture
by SkyCapt - 2020, January 11 - 12:51pm

Definitely go with CHUD v4.x on Tiger. And use the CHUD Remover to scrub off this'un. I'd even run several versions of CHUD Remover to make sure you get it all gone.

Protocol 7's picture
by Protocol 7 - 2020, January 5 - 12:53pm

I had a weird issue with this when I tried it on my MDD running Tiger. For some reason it caused constant hard disk activity. So I ended up removing it.

Bolkonskij's picture
by Bolkonskij - 2020, January 4 - 8:47pm

The enable nap feature helped me to lower the temperature of my dual CPU MDD by an average of 3-4° C. That's pretty amazing for a "software solution". Not to mention the MDD fan noise got less, so highly recommending it if you're owning a dual CPU MDD and OSX.