![]() ![]() The way the CPU heatsink is designed, each one of mine (when I got it) has had a BLOCKED channel in the heatsink grill. You need to remember to take off some fan covers and the cpu shroud (but not the heatsink) to get all the dust out of there. A can of air will probably work pretty good, but i'm talking about high psi. Take a good air compressor, if you have it, and clean that sucker out. The power supply at the bottom, the low profile easily-clogged cpu heatsink, and the hard drive fan are the ones to get caked with dust first. I dont have a solution for the system fan, but I wanted to point out a very important task that has fixed 90% of the 'broken' iMac G5's i'm constantly buying on craigslist. Because you can literally do anything that you want. Word to the wise, don't do anything stupid as the root user. Select that, type root as username, and then enter in the password that you did before, and you are all set to go to work as the root user! Then log out, a new user is available at the login screen called other. ![]() (Under 10.4 i think that the option is located somewhere in the Network Utility Program.) Then click edit/enable root user. ![]() If you do not have root user enabled, open directory utility (for 10.5) and authenticate. Reboot the computer and your all set!īy the way, for those that don't know, you can only edit a system extension while operating as the root user. (I wanted to drop the temp by ten degrees, so subtracted 2,560 from every number shown). 55 deg is shown as 14080 and i changed that to 11520 to match 45 deg.) Change the other temps accordingly. I changed my fan-hysteris-temp (i am assuming that it is the "ideal when computer is idle" temp) from 55 deg C to 45 deg C. Near the bottom of that file is a list of numbers (Shown on the site referenced above) simply make your changes according to the info provided, and your all set. Open the Contents folder that shows up, and then edit the ist file in there. Actually, you don't edit that directly, but rather ctrl click on it, and select Show Package Contents. That way, they start cooling the machine at a lower temperature, thus keeping the computer overall cooler.īasically, you need to edit, as stated above, AppleFan.kext which is located at /System/Library/Extensions/AppleFan.kext. On there, I found a way to edit the AppleFan.kext file to decrease the base Temp for the fans to start speeding up on. I really can't figure out why, it seems like a very common problem, alot of people are asking about it, but there aren't any answers being given.ĭo I ended up doing a generic search for how to increase fan speeds on any mac, and came across which has some pretty good Mac modding advice. So, there are not very many answers to this question floating around the internet. ![]()
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