You can also place your computer on a cooling pad that will help keep it from overheating. You can avoid this by keeping your computer at a reasonable temperature. Hard drives are susceptible to heat, so using your computer at a high temperature may cause the hard drive to work harder and cause the fan to turn on. If you notice that your fan is always on and you are not running any programs, the problem may lie with your hard drive. This can cause your processor to get hot therefore, the fan will kick into gear to keep everything cool and running smoothly. Your computer may be running unnecessary background processes or programs that are keeping it from being able to run smoothly. Both issues could have different yet similar root causes, which I will discuss below. Most users who claim that their MacBook fan is always on are talking about the fan being either overly loud or spinning at an unusually high rate. The MacBook will probably shut down if the fan isn’t running for a long time to prevent damage from overheating. It is essential, however, to understand that your MacBook’s fan should always be on. Possible reasons for a MacBook fan to remain running all the time include dust buildup, intensive GPU usage, and everyday wear and tear. The MacBook fan always-on problem typically doesn’t mean anything significant and may be resolved with little difficulty. Resetting the SMC (System Management Controller) and clearing out dust from the heatsink and vents can often fix a MacBook Pro fan that’s always running. Range at Which MacBook Pro Fans Turn On.Delete the Fan Control Preferences File.Fixing MacBook Fan Always On – Fix Problem.SmcFanControl won't allow you to set the fan speed lower than Apple's default, so there shouldn't be any risk from using this app. I've been using it to increase the fan speed when I have the machine on my lap, and reduce it again when it returns to the desk. It's important to note that smcFanControl is just an app - it doesn't install any components (unless you want it to run at startup). But in exchange for a cooler lap, I think it's worth it. Perhaps slightly reduced battery life, and a bit more wear and tear on the fan components. The downsides? More fan noise, obviously - although 3,000rpm was fine for my ears (though I probably wouldn't use that setting in a library). Perhaps if you're wearing noise a cancelling headset it would be bearable. but I was having trouble enjoying it, thanks to the 747 that seemed to be landing nearby. ![]() ![]() When I set the fan to max speed, I saw an even nicer temperature drop. Later today, I hope to get some more empirical data through a USB temperature probe. Using smcFanControl, I upped the speed to 3,000rpm, and saw a notable (two to four degrees Celsius) temperature drop. But on my lap, it gets just a bit too warm. It works with the MacBook, MacBook Pro, and Intel-powered minis, and it works well.Īpple sets the fan's speed at 1,500rpm, and this works well when I have the machine on the desk. As seen in the picture at left, this simple app gives you a slider to set the minimum speed for your laptop's fan(s). While I can't do anything about the first problem, thanks to smcFanControl, the second issue is now completely within my control. The only two things I'm disappointed in are the size (I love the 12" form factor) and the high case temperature (especially in the bottom left corner). Generally, I've been thrilled with the MacBook's performance, despite having to send it back to repair a way-too-warm power adapter (the repairs were successful). The price and performance of the MacBook struck a sweet spot with me, and I purchased one of the first black units to show up in the Portland area (I waited to see them in person so I could judge the reflective screen's performance for myself). When the MacBooks were announced, I made my purchase decision relatively quickly - I wanted something faster than my PowerBook G4, but didn't want to spend $2K+ for a MacBook Pro.
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