MacBook Air 11 (mid 2013) running slowly

ronfouchier

macrumors newbie
Original poster
Feb 27, 2019
4
1
Hi there,

I recently bought a mid 2013 11 MacBook Air off of eBay.

Upon arrival I removed the bottom cover to clean out the fan and the air vents, before doing a clean install of macOS Mojave.

Unfortunately the MacBook Air does run very slowly from time to time with kernel_task taking up between 300% and 1200% CPU usage.

Any ideas what might be causing this?

Best,
Ron

EtreCheck version: 5.1 (5020)


Report generated: 2019-02-27 22:40:02

Download EtreCheck from https://etrecheck.com

Runtime: 2:26

Performance: Excellent

Sandbox: Enabled

Full drive access: Disabled


Problem: Computer is too slow


Major Issues:

Anything that appears on this list needs immediate attention.


No Time Machine backup - Time Machine backup not found.


Minor Issues:

These issues do not need immediate attention but they may indicate future problems.


Unsigned files - There are unsigned software files installed. They appear to be legitimate but should be reviewed.

Limited drive access - More information may be available with Full Drive Access.


Hardware Information:

MacBook Air (11-inch, Mid 2013)

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 ok

BANK 1/DIMM0 - 2 GB DDR3 1600 ok

Battery: Health = Normal - Cycle count = 703


Video Information:

Intel HD Graphics 5000 - VRAM: 1536 MB

Color LCD 1366 x 768


Drives:

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

Internal PCI 5.0 GT/s x2 Serial ATA

disk0s1 - EFI (MS-DOS FAT32) [EFI] 210 MB

disk0s2 [APFS Container] 121.12 GB

disk1 [APFS Virtual drive] 121.12 GB (Shared by 4 volumes)

disk1s1 - 1****B (APFS) (Shared - 28.12 GB used)

disk1s2 - Preboot (APFS) [APFS Preboot] (Shared)

disk1s3 - Recovery (APFS) [Recovery] (Shared)

disk1s4 - VM (APFS) [APFS VM] (Shared - 1.07 GB used)


Mounted Volumes:

disk1s1 - 1****B 121.12 GB (91.24 GB free)

APFS

Mount point: /


disk1s4 - VM [APFS VM] (Shared - 1.07 GB used)

APFS

Mount point: /private/var/vm


Network:

Interface en0: Wi-Fi

802.11 a/b/g/n/ac

Interface en2: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge


System Software:

macOS Mojave 10.14 (18A391)

Time since boot: Less than an hour


Security:

GatekeeperEnabled

System Integrity ProtectionEnabled


Unsigned Files:

Launchd: /Library/LaunchDaemons/com.microsoft.office.licensing.helper.plist

Executable: /Library/PrivilegedHelperTools/com.microsoft.office.licensing.helper

Details: Exact match found in the whitelist - probably OK


System Launch Agents:

[Not Loaded] 17 Apple tasks

[Loaded] 187 Apple tasks

[Running] 95 Apple tasks


System Launch Daemons:

[Not Loaded] 36 Apple tasks

[Loaded] 194 Apple tasks

[Running] 104 Apple tasks


Launch Daemons:

[Loaded] com.microsoft.office.licensing.helper.plist (? 6d8cb30e - installed 2010-08-31)


User Launch Agents:

[Loaded] com.dropbox.DropboxMacUpdate.agent.plist (Dropbox, Inc. - installed 2019-02-21)


User Login Items:

Alfred 3.app (Running with Crayons Ltd - installed 2019-02-02)

(/Applications/Alfred 3.app)


Internet Plug-ins:

SharePointBrowserPlugin: 14.6.3 (installed 2019-02-21)

QuickTime Plugin: 7.7.3 (installed 2018-09-21)


Time Machine:

Time Machine Not Configured!


Performance:

System Load: 1.36 (1 min ago) 3.99 (5 min ago) 6.16 (15 min ago)

Nominal I/O speed: 4.19 MB/s

File system: 38.15 seconds

Write speed: 317 MB/s

Read speed: 746 MB/s


CPU Usage:

Type Overall

System 4 %

User 3 %

Idle 93 %


Top Processes by CPU:

Process (count) CPU (Source - Location)

Other processes 22.36 % (?)

EtreCheck 6.15 % (App Store)

Dock 0.06 % (Apple)

SafariCloudHistoryPushAgent 0.03 % (Apple)

SafariBookmarksSyncAgent 0.03 % (Apple)


Top Processes by Memory:

Process (count) RAM usage (Source - Location)

EtreCheck 429 MB (App Store)

NotificationCenter 69 MB (Apple)

garcon 65 MB (Dropbox, Inc.)

Spotlight 58 MB (Apple)

Finder 52 MB (Apple)


Top Processes by Network Use:

Process Input / Output (Source - Location)

mDNSResponder 28 KB / 25 KB (Apple)

apsd 4 KB / 5 KB (Apple)

netbiosd 1 KB / 776 B (Apple)

SystemUIServer 0 B / 128 B (Apple)

ViewBridgeAuxiliary 0 B / 0 B (Apple)


Virtual Memory Information:

Available RAM 1.90 GB

Free RAM 655 MB

Used RAM 2.10 GB

Cached files 1.26 GB

Swap Used 0 B


Software Installs (past 30 days):

Install Date Name (Version)

2019-02-21 Microsoft Office for Mac 2011

2019-02-21 Office 2011 14.1.0 Update

2019-02-21 Office 2011 14.2.0 Update

2019-02-21 Office 2011 14.6.3 Update

2019-02-26 XProtectPlistConfigData (2101)

2019-02-26 Gatekeeper Configuration Data (163)

2019-02-26 MRTConfigData (1.40)

2019-02-27 EtreCheck (5.1)


Diagnostics Information (past 7 days):

Directory /Library/Logs/DiagnosticReports is not accessible without Full Drive Access.


End of report
 

Attachments


Audit13

macrumors 601
Apr 19, 2017
4,415
1,112
Toronto, Ontario, Canada
Try and SMC and NVRAM reset. Hopefully this will resolve the issue.

How is the battery health?

Run the Air without the battery connected. It may run a bit slow but it should reduce the cpu usage; however, the Air's cpu will be downclocked since there is no battery connected. If everything works without high cpu usage, it may be time to change the battery.
 
  • Like
Reactions: Macdctr

ronfouchier

macrumors newbie
Original poster
Feb 27, 2019
4
1
Hi
Disable Alfred from Starting as you log in.
Hi Ruskes,

thanks for your feedback.
The MacBook Air runs fine now, but I did not end up making any changes besides the suggested NVRM.
I let it sit there for a while and now it runs smoothly wether or not it is plugged in.

Cheers,
Ron
[doublepost=1551607205][/doublepost]
Try and SMC and NVRAM reset. Hopefully this will resolve the issue.

How is the battery health?

Run the Air without the battery connected. It may run a bit slow but it should reduce the cpu usage; however, the Air's cpu will be downclocked since there is no battery connected. If everything works without high cpu usage, it may be time to change the battery.
Hi Audit,

besides the 700+ cycles macOS says that the battery health is normal.
I had done the SMC reset beforehand and did the NVRAM reset later on.
There is the occasional stutter from time to time, but it runs leaps and bounds faster than before.

Thanks for your tips,
Ron
 
  • Like
Reactions: Audit13

Audit13

macrumors 601
Apr 19, 2017
4,415
1,112
Toronto, Ontario, Canada
Hi Audit,

besides the 700+ cycles macOS says that the battery health is normal.
I had done the SMC reset beforehand and did the NVRAM reset later on.
There is the occasional stutter from time to time, but it runs leaps and bounds faster than before.

Thanks for your tips,
Ron
Even though the battery health is good, it may have dramatically reduced capacity.

Regardless, glad you got it solved.
 

Macdctr

macrumors 6502a
Nov 25, 2009
615
294
Ocean State
This is what Coconut Battery looks like.
Looks like your battery's charge capacity has dropped as Audit pointed out. Status will still say good even though the battery has gone to a point where it won't hold a charge long enough to be useful for any work... keep that in mind. My battery on my 2012 MBA was at a point where I had to keep the computer on a charger even though battery status read good...

I replaced the battery in my 11inch MBA and it has been solid since...this is what I have:



It's very easy to replace batteries in the MBA as compared to other laptop designs.
 

ronfouchier

macrumors newbie
Original poster
Feb 27, 2019
4
1
Looks like your battery's charge capacity has dropped as Audit pointed out. Status will still say good even though the battery has gone to a point where it won't hold a charge long enough to be useful for any work... keep that in mind. My battery on my 2012 MBA was at a point where I had to keep the computer on a charger even though battery status read good...

I replaced the battery in my 11inch MBA and it has been solid since...this is what I have:



It's very easy to replace batteries in the MBA as compared to other laptop designs.
Thanks for the input. I can run the Air around 2,5 to 3 hours without it being plugged in.
I agree, replacing the battery looks fairly easy judging YouTube tutorials.
 

Macdctr

macrumors 6502a
Nov 25, 2009
615
294
Ocean State
Thanks for the input. I can run the Air around 2,5 to 3 hours without it being plugged in.
I agree, replacing the battery looks fairly easy judging YouTube tutorials.
ifixit also has very good repair guides that show you step-by-step how to replace various components inside the MacBook Air. You can also source tools necessary to do the job from them.
 
  • Like
Reactions: ronfouchier