798      iPhone_iPad_Mac_apple

kernel using too much cpu and making fan spin v...

Hi people,

I recently inherited this Macbook Air from a lover and wanted to get it working. First thing we changed was the thermal paste which had dried up. It now works relatively normally albeit a bit slow and the fan continues to hum at a very high speed.

Having looked at system diagnostics it reveals that the kernel is using from 200 to 350% of the CPU which cannot be right and must be the reason for which the CPU is getting all hot and bothered. Finding a solution to why the kernel is playing up in this way seems to be connected to individual user dynamics, which is why I have posted this EtreCheck report below:

EtreCheck version: 3.4.2 (436)

Report generated 2017-08-20 20:44:45

Download EtreCheck from https://etrecheck.com

Runtime: 7:17

Performance: Below Average

Click the [Lookup] links for more information from Apple Support Communities.

Click the [Details] links for more information about that line.

Problem: Computer is too slow

Description:

kernel_task taking too much CPU

Hardware Information: ⓘ

    MacBook Air (11-inch, Mid 2013)

    [Technical Specifications] - [User Guide] - [Warranty & Service]

    MacBook Air - model: MacBookAir6,1

    1 1.3 GHz Intel Core i5 (i5-4250U) CPU: 2-core

    4 GB RAM Not upgradeable

        BANK 0/DIMM0

            2 GB DDR3 1600 MHz ok

        BANK 1/DIMM0

            2 GB DDR3 1600 MHz ok

    Bluetooth: Good - Handoff/Airdrop2 supported

    Wireless:  en0: 802.11 a/b/g/n/ac

    Battery: Health = Normal - Cycle count = 255

Video Information: ⓘ

    Intel HD Graphics 5000 - VRAM: 1536 MB

        Color LCD 1366 x 768

Disk Information: ⓘ

    APPLE SSD SD0128F disk0: (121.33 GB) (Solid State - TRIM: Yes)

    [Show SMART report]

        (disk0s1) <not mounted>  [EFI]: 210 MB

        Untitled (disk0s2 - Journaled HFS+) /  [Startup]: 120.47 GB (109.26 GB free)

        (disk0s3) <not mounted>  [Recovery]: 650 MB

USB Information: ⓘ

     XHCI Root Hub SS Simulation

     XHCI Root Hub USB 2.0 Simulation

        Apple Inc. BRCM20702 Hub

            Apple Inc. Bluetooth USB Host Controller

Thunderbolt Information: ⓘ

    Apple Inc. thunderbolt_bus

System Software: ⓘ

    OS X Mavericks 10.9.5 (13F1911) - Time since boot: less than an hour

Gatekeeper: ⓘ

    Mac App Store and identified developers

System Launch Agents: ⓘ

    [not loaded]    4 Apple tasks

    [loaded]    152 Apple tasks

    [running]    28 Apple tasks

System Launch Daemons: ⓘ

    [not loaded]    50 Apple tasks

    [loaded]    143 Apple tasks

    [running]    55 Apple tasks

Internet Plug-ins: ⓘ

    Default Browser: 537 (installed 2017-07-06)

    QuickTime Plugin: 7.7.3 (installed 2017-07-10)

3rd Party Preference Panes: ⓘ

    None

Time Machine: ⓘ

    Time Machine not configured!

Top Processes by CPU: ⓘ

       259%   kernel_task

        11%   sysmond

         4%   ps

         3%   WindowServer

         1%   Activity Monitor

Top Processes by Memory: ⓘ

    349 MB    com.apple.WebKit.WebContent

    292 MB    kernel_task

    173 MB    com.apple.WebKit.WebContent

    146 MB    com.apple.WebKit.WebContent

    135 MB    com.apple.IconServicesAgent

Top Processes by Energy Use: ⓘ

     18.08 sysmond

      3.54 WindowServer

      1.52 Activity Monitor

      0.14 launchd

Virtual Memory Information: ⓘ

    1.80 GB   Available RAM

    93 MB     Free RAM

    2.20 GB   Used RAM

    1.71 GB   Cached files

    0 B       Swap Used

Diagnostics Information: ⓘ

    2017-08-20 19:35:15    Kernel Panic [Open] [Details]

        3rd Party Kernel Extensions: None

Other than your MacBook Air (MBA) is starved for RAM at 4 GBs, there was a Kernel Panic noted in the report. We would need to see, at least, the first half of this report to get an idea on what may be the cause.

When your computer spontaneously restarts or displays "Your computer restarted because of a problem." - Apple Support

最后更新：2017-08-21 03:41:09

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