Fan noisy and slow speed for the Macbook Air with 10.11.4

I hope you can help me.

I upgraded 10.11.4 on my Macbook Air a couple of days. It is a model of 2013 Mid, 1.7 Ghz Core i7, 8 GB of RAM.

I don't know exactly what my last update was - but was El Capitan any.

I tried LANDAU and SMC resets.

Previously, she has chugged along fine. The fan was quiet most of the time - only hit on when I used Lightroom.

Now, the fan kicks on regularly, most of the time actually. And it's MUCH slower. Very lag sometimes when you type in Wordpress, for example. And lightroom is much slower. Also, when I use FaceTime, video often turns itself on and off--with a message informing me that it will resume when the computer cools down. Yet the back of the computer does feel not hot at all.

I tried page of Chrome in Safari. Doesn't seem to help much.

I am currently traveling to the Peru and did not my hard drive with my last backup, Time Machine, by hand, so as I understand it, I can't go back to a previous update.

The Kernal task often seems to have a very high CPU %: 250 or.

Right now, I'm trying to download the Combo, I read that this can sometimes fix glitches.

Any help is greatly appreciated!

The kernel uses excessive CPU cycles. Here are a few possible causes for the State. Some may not apply to you.

FileVault

Please, open the security and privacy pane in system preferences and click the FileVault tab. If there is an indication that the encryption or decryption is in progress, wait (possibly several hours) so he can finish and see if there is an improvement.

Limitation of the

When he does readings of high temperature in the material, or a MacBook battery low voltage readings, the kernel can try to compensate by interrupting the processor to slow them down and reduce energy consumption. This condition may be due to:

☞ an accumulation of dust on the logic board

High ambient temperature ☞

☞ a defective battery or worn in a laptop

☞ the malfunction of a cooling fan, temperature probe, a probe or some other component voltage internal

Note that if the problem is caused by a sensor, there can be no real overheating or undervoltage.

If the computer is portable, try with and without the power adapter connected. If pigs kernel_task processor only on current alternative, load is causing the machine to heat up. This behavior may be normal for some models, but it can also be an indication of a hardware failure.

Apple diagnostics or the Apple Hardware Test, although not very reliable, is sometimes able to detect a fault. For more in-depth material test, an appointment of 'Genius' to an Apple Store, or go to an other authorized service provider.

If all goes well with the material, then everything that you can do to improve the cooling can help.

Software installed

The software installed by the user which includes a device driver or other kernel code can thrash of the kernel. This category includes virtualization, such as Parallels and VMware software, as well as products 'anti-virus' more commercial. Some system monitoring applications, like "iStat", may also contribute to the problem. You can test this possibility to completely disable or remove the software according to the instructions of the developer or start in safe mode. However, it should be noted that the deactivation of a modification of the system without removing or test in safe mode is not as easy as you think.

Corrupt NVRAM or MSC data

Sometimes, the problem is cleared up by resetting NVRAM memory or MSC.

External display

Connect an external display to some models of MacBook Pro while the lid is open can cause this problem. If necessary, use the external clamshell modescreen.

Other devices

Disconnect devices wired everything except those needed at startup and remove all the expansion cards of third parties (if your model.) If the problem is resolved, reconnecting devices one by one by one until you identify the culprit.

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