Useful Tools

• QuickFans is a usefull tool that displays the current temperature and fan speed in the menubar. This may not work on all machines. Alternative Link
• G4FanControl is the best fan control utility for PowerPC G4, and G3 machines. Alternative Link

Other options

1. The AppleFan.kext is located in System/Library/Extensions/AppleFan.kext
2. Right click on this file and select ‘Get Info’
3. Under ‘Sharing and Permissions’ change the privilege for ‘everyone’ to ‘Read & Write’.
4. Right click on the file and select ‘Show Package Contents’, then open the ‘Contents’ folder.
5. Open the Info.plist file and replace the relevant values with the ones below:

           <integer>13300</integer>
           <key>fan-polling-period</key>
           <integer>8</integer>
           <key>fan-slowdown-delay</key>
           <integer>16</integer>
           <key>fan-speed-table</key>
           <array>
             <integer>13800</integer>
             <integer>14200</integer>
             <integer>14600</integer>
             <integer>15000</integer>
             <integer>15500</integer>
             <integer>16000</integer>
             <integer>15500</integer>
             <integer>16768</integer>
             <integer>17200</integer>
             <integer>17800</integer>
             <integer>18176</integer>
             <integer>18700</integer>
             <integer>18950</integer>
             <integer>19100</integer>
             <integer>19150</integer>
             <integer>19200</integer>
           </array>
           <key>fan-speedup-delay</key>
           <integer>8</integer>
   

6. Save and close the file.
7. Open the 'Terminal' app and run the following command:
   sudo chown -R root:wheel /System/Library/Extensions/AppleFan.kext This prevents a dialogue appearing at the next boot stating that the extension was installed improperly by resetting the file's ownership permissions back to defaults.