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Repeated "smcReadKeyAction" errors in the OS X console may be from third-party software, or be fixed by downgrading kernel extensions.
When troubleshooting any system, having a few useful tools available can be very helpful. Here are some recommendations for troubleshooting a number of aspects of Mac systems.
The black-screen bug that some MacBook users are experiencing in OS X Lion may be a hardware malfunction exposed by differences in how Lion handles the system hardware.
Open source and your Mac. What a combo! Here's an open-source program for keeping your MacBook Pro cool.
Utilities Updates: Peek-a-Boo 2.6.1; smcFanControl 2.1.1; File Synchronization 1.4.2v129; Mac Pilot 2.2.6; more
If you've got burnt thighs from an old MacBook Pro or you notice that your computer is always overheating and crashing from using CPU-intensive apps, you might want to check out smcFanControl.
Utilities Updates: Drive Genius 1.5.3; Tiger Cache Cleaner 3.2.6; smcFanControl 2.0; BBEdit 8.6.1; more
Utilities Updates: smcFanControl 1.22; WiLMa 1.3; iPulse 2.1.6; Delicious Library 1.6.4; more
Utilities Updates: smcFanControl 1.21a; FileChute 2.5.2; 7zX 1.5.1; Em@ilCRX 1.4.3; more
Utilities Updates: Mozilla Firefox 2.0 RC 3; smcFanControl 1.2; Mactracker 4.1b1; Relaunch 1.3.3; more