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drtanz
Sep 25, 2013, 01:34 PM
I have a Macbook air and the fan is almost constantly running at full speed, while the CPU cores are in the 90-100 degree range. Apart from the fan becoming annoying, I am afraid of damaging some component with all this activity going on? This behaviour is quite new, I used it for months before this started and it wasn't like this, it only went on full fan occasionally during some operation like exporting a screencast.

Any things I can try to fix it? Activity monitor shows kextd running at 90-95 CPU usage most of the time, while MailPlane, Chrome and InsomniaX are the biggest memory hogs.

Specs attached.



GGJstudios
Sep 25, 2013, 01:36 PM
I have a Macbook air and the fan is almost constantly running at full speed, while the CPU cores are in the 90-100 degree range. Apart from the fan becoming annoying, I am afraid of damaging some component with all this activity going on? This behaviour is quite new, I used it for months before this started and it wasn't like this, it only went on full fan occasionally during some operation like exporting a screencast.

Any things I can try to fix it? Activity monitor shows kextd running at 90-95 CPU usage most of the time, while MailPlane, Chrome and InsomniaX are the biggest memory hogs.

Specs attached.
Nothing will be damaged. Your Mac will automatically shut down to prevent that from happening. Obviously, you have some processes that are consuming CPU usage and driving up temps. Quit apps and processes until you find the culprit.

If you're not already doing so, use iStat Pro (http://istat-pro.en.softonic.com/mac/download) (free) or iStat Menus (http://bjango.com/mac/istatmenus/) ($16) to get accurate readings of your temps, fan speeds, etc., rather than relying on your sense of touch or sound. A forum member has posted a copy of iStat Pro that has been "tweaked" to enhance compatibility with Mountain Lion. You can download it here (http://forums.macrumors.com/showpost.php?p=16277293&postcount=134).  The Intel processors used in Macs are designed to automatically shut down to prevent damage if they truly overheat. CPU Tjmax = 105C (221F), GPU Tjmax = 100C (212F) on i3, i5, i7 processors. (Source: Intel (http://www.intel.com/Assets/PDF/specupdate/322814.pdf))  Unless there is a rare defect in a Mac, most temps are well within the normal operating range, considering the workload being put on it. Websites with Flash content, games and other multimedia apps will put higher demand on the CPU/GPU, generating more heat. This is normal. If you're constantly putting high demands on your system, such as gaming or other multimedia tasks, expect temps to rise and fans to spin up accordingly. It's just your Mac doing its job to maintain temps within the normal range.  It is also quite normal for your Mac to become extremely hot to the touch during intensive operations. The aluminum body transfers heat more effectively than other materials used in computer casings, so you will feel the heat more. This doesn't indicate that it's overheating and will not harm the computer to be hot to the touch. The bottom of your Mac notebook may become very warm during normal use. If your notebook is on your lap and gets uncomfortably warm, move it to a stable work surface that allows for good ventilation.Your fans are always on when your Mac is on, spinning at a minimum of 2000 rpm (for MBPs) or 1800 rpm (for MBAs, MBs and minis), or 1200 for the newest MBAs. Older iMacs have 3 fans with minimum speeds in the 800-1200 range, while the newest iMacs have a single fan, spinning at a minimum of about 1400 rpm. They will spin faster as needed to keep temps at a safe level. If your fans are spinning up without increased heat, try resetting the SMC (http://support.apple.com/kb/ht3964). (PRAM/NVRAM has nothing to do with these issues, so resetting it will not help.)  The intake and exhaust vents are in the back of the computer near the hinge on all Mac notebooks (except the new MBP with retina display, which has intake vents along the sides at the bottom). The iMac vent is a slot on the back near the top of the computer. Make sure the vents remain unblocked to allow your computer to perform at its best. Learn about the fans in your Mac (http://support.apple.com/kb/HT4543)  Mac Portables: Operating temperature (http://support.apple.com/kb/HT1778) For Flash-related issues: Find your Flash version (http://kb2.adobe.com/cps/155/tn_15507.html#main_LatestFlashPlayer) and make sure it's the latest version (http://www.adobe.com/software/flash/about/) available. Install ClickToFlash (http://hoyois.github.com/safariextensions/clicktoplugin/) (Safari), Flashblock (https://addons.mozilla.org/en-US/firefox/addon/flashblock/) (Firefox) or FlashBlock (http://www.chromeextensions.org/appearance-functioning/flashblock/) (Chrome) to control which Flash content plays on websites. Use the YouTube HTML5 Video Player (http://www.youtube.com/html5) to watch YouTube videos, when available. (May impact fullscreen viewing. See link for details.)

drtanz
Sep 25, 2013, 01:52 PM
Attached are the statistics I'm seeing pretty much the whole day.

GGJstudios
Sep 25, 2013, 02:02 PM
Attached are the statistics I'm seeing pretty much the whole day.
As I said, start quitting apps and processes until you identify the one responsible.

drtanz
Sep 25, 2013, 02:09 PM
Right, but isn't activity monitor a better place to look at issues? The fan is running because the CPU is hot, and therefore we need to look at what's using the CPU right? And kextd is at 90-95% all the time.

GGJstudios
Sep 25, 2013, 02:13 PM
Right, but isn't activity monitor a better place to look at issues? The fan is running because the CPU is hot, and therefore we need to look at what's using the CPU right? And kextd is at 90-95% all the time.
Yes it is. You already stated that you had looked at Activity Monitor, so I figured you knew how to do that. That's were you can start quitting apps/processes, beginning with the ones using most of the resources. Be sure you're looking at "All Processes" and not "My Processes".

drtanz
Sep 25, 2013, 02:22 PM
Alright, well when I try to quit kextd it starts again automatically, is it an essential resource, and isn't it abnormal to take so much of the CPU?

GGJstudios
Sep 25, 2013, 02:25 PM
Alright, well when I try to quit kextd it starts again automatically, is it an essential resource, and isn't it abnormal to take so much of the CPU?
Start with the other apps/processes. If you need help, follow every step of the following instructions precisely. Do not skip any steps. Launch Activity Monitor Change "My Processes" at the top to "All Processes" Click on the "% CPU" column heading once or twice, so the arrow points downward (highest values on top). (If that column isn't visible, right-click on the column headings and check it, NOT "CPU Time") Click on the System Memory tab at the bottom. Take a screen shot (http://guides.macrumors.com/Taking_Screenshots_in_Mac_OS_X) of the entire Activity Monitor window, then scroll down to see the rest of the list, take another screen shot Post your screenshots (http://forums.macrumors.com/showpost.php?p=14126379&postcount=16).

drtanz
Sep 25, 2013, 02:52 PM
See attached

Jpeppard
Sep 25, 2013, 10:10 PM
It seems as though you managed to cut out the relevant portion of Activity monitor. You need to open it, show all processes, sort by CPU usage and the top process will be your culprit.