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SMC FAN CONTROL ODD PRO
SMC FAN CONTROL ODD MAC

Then check the Startup Disk, Display, and Date & Time panes of System Preferences to make sure they're set the way you want them.

SMC FAN CONTROL ODD MAC

If you have an older Mac that chimes at boot, hold down the keys until you hear a second startup chime. Then let go and allow your Mac to continue starting normally.

Keep holding down those keys for about 20 seconds.

Press the power button, and as soon as you power up the laptop, hold down Command-Option-P-R.

To reset your NVRAM, you use exactly the same procedure you once used to reset PRAM. If you would like the system to inspect the NVRAM on an M1 Mac, shut it down completely, wait a few seconds, and then power up the Mac. There isn't a key combination that you hold down while starting up the Mac. On M1 Macs, the NVRAM is tested during the startup process, and if the system detects a need to reset, it will. NVRAM corruption is fairly uncommon, but if your Mac seems to take forever to figure out the correct boot disc, starts up with the wrong screen resolution, or suffers from weird audio problems (like there's no sound whatsoever or the menu bar's volume control is grayed out), a reset of the NVRAM might help-and it's quick and harmless. NVRAM serves approximately the same purpose as PRAM, but instead of storing a dozen or more pieces of information, it now contains just a few: your selected startup disk, speaker volume, screen resolution, time zone, and-if your Mac has crashed recently-details of the last kernel panic. Modern Macs no longer use PRAM they instead use something called NVRAM (NV for non-volatile). So you could press a key sequence at startup to reset (or zap) the PRAM, returning it to default, factory values.

If the values in this memory got out of whack for one reason or another, your Mac might not start up correctly or might exhibit any of numerous odd behaviors afterward. The P in PRAM stood for parameter (the RAM was just RAM-random access memory), and it referred to a small amount of special, battery-backed memory in every Mac that stored information the computer needed before it loaded the operating system. Zap the NVRAM (or PRAM)īack in the day, the standard list of quick fixes for random Mac ailments always included clearing the PRAM. For M1 Macs, try shutting down the computer, waiting for several seconds, and then boot it up. M1 Macs don't have a procedure for zapping the NVRAM, and they don't have an SMC.

The procedures here apply to Intel-based Macs. Your repair repertoire should also include a couple of additional procedures that can occasionally eliminate otherwise inscrutable problems-zapping the NVRAM and resetting the SMC. This most recent version adds support for every current MacBook, MacBook Pro, MacBook Air, and Mini.When your Mac starts acting up, you'll probably run through some common troubleshooting procedures, such as restarting it, running Disk Utility, and perhaps performing a Safe Boot. As with any settings-tinkering software, you'll want to use smcFanControl judiciously-but fortunately this application always keeps fans in automatic mode (so speed will increase along with CPU load) and never lets you set the fan speed below the Apple-recommended minimum. SmcFanControl lets you monitor the current temperature (in Celsius or Fahrenheit), assign different minimum speeds for each fan using sliders, and even apply different settings when your power source changes (for example, going back to default fan speed when using battery power). This free, GPL-licensed utility has a single purpose: letting you increase the minimum speed of built-in fans, so your Intel computer will run cooler.

SMC FAN CONTROL ODD PRO

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 (like playing PC games in a virtual Windows environment), you might want to check out smcFanControl. SmcFanControl lets the user set the minimum speed of the build-in fans.