MACh Speed Control

3.4.2 05 Dec 2005

Processor control panel.


Developer website: Daystar Technology

MAChSpeed Control - MAC CPU Performance Software for Mac OS X. MSC delivers a wide range of unparalleled CPU/Cache tools for configuration, testing and monitoring for all PowerPC CPUs.

MAChSpeed Control now includes more exclusive benefits.

  • Works in any Apple OS from 9 though 10.4 Tiger!
  • Crank "tested" backside cache speeds on iMac, PowerMac G3, G4 systems and CPU upgrade cards.
  • Boost CPU speeds on iBook G3s and fast G3 CPU Upgrades!
  • Isolate problem CPU and Cache problems on all Apple single CPU systems.
  • Run 100% compatible when Mac OSX is installed on "OS X Unsupported Systems".
  • Faster G4 speeds for applications in Mac OS 9
  • Better application compatibility for upgraded Power Mac G4 systems

As always, it provides performance and compatibility tools for Mac CPUs. Its features include configuration, testing and reporting of the CPU and Caches. MAChSpeed Control supports all single processor G3/G4/G5 Apple Systems and CPU Upgrades, in OS 9 and OS X with 100% assured compatibility and performance.


  • System tuning. Works around a variety of processor errors in early G3 and G4 CPUs
  • System Information. Ensure accurate CPU details in Apple System Profiler, and Applications
  • Advanced AltiVec Support. True across-the board compatibility with AltiVec applications.
  • CPU Startup Speed Management. Available on 750 FX/GX CPUs.
  • System 9 through Mac OS 10.4. Supports, by far, the widest range of CPUs available.
  • Reset Mode. Allows the user to reset to defaults, if the CPU/cache fail at high speed.
  • Improved XPOSTFACTO support. Extends compatibility to older systems with OSX installed.


  • Improved Memory / Cache Performance. Uses faster settings to maximize performance.
  • Semi-automatic Cache. Allows user to choose from tested “safe” speeds.
  • Dynamic CPU Speed Switching. Available on 750 FX/GX CPUs as found in the iBook G3 and on high-speed G3 upgrades. This feature changes the CPU speed on the fly via software (750 FX/GX only).

Testing And Reporting:

  • Automatic CPU/Cache Profiling. Exclusive system profiling and initialization at startup.
  • Factory Retest on Restart. Allows the utility to re-profile and test the cache on every restart.
  • Active CPU/Cache Test. When opened, the utility performs a looping CPU/Caches/RAM test.
  • Dynamic Status Information. Provides real-time updates of speed, CPU, and caches.
  • Thermal Monitoring. Will alert you if overheating occurs (750 - 7410 CPUs only).
  • Memory. A memory overview (with optimization) is available on Beige G3 and earlier machines.

Simply install and reboot. The smart cache features test your CPU and stabilize your system immediately. Checking statistics is just a click away. Open the interface to perform an active test, check settings, change Cache configuration or check RAM. Note: Does not support dual CPUs.


Mac OS X 10.1 - 10.4.x.

*Previously available here


Current Version (3.x)


Version Downloads
Utilities / Optimizers
05 Dec 2005
OS X / PPC 32