macOS High Sierra Grey Login Background Issue

Question

Level 1

4 points

macOS High Sierra Grey Login Background Issue

To whom this may concern at Apple Inc.,

Hi my name is Paul from Bangkok, Thailand & I require some assistance please.

Currently I just updated my MacBook Air 13-Inch Early 2015 to the recent OS "macOS High Sierra 10.13.5"

However, my login screen for my mac suddenly displays this grey background wallpaper instead of the blur transparent one like in my previous OS versions.

My questions to you guys is .. is there anyway to fix this issue?

Besides my login screen background being grey everything else is fine.

Regards,

Paul

MacBook Air, macOS High Sierra (10.13.5)

Posted on Jun 16, 2018 11:40 PM

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Answer 1

Top-ranking reply

Luis Sequeira1

Level 9

73,518 points

Jun 20, 2018 8:16 AM in response to PaulBKK19

Are you the first user of the machine? If not, then the previous suggestion cannot work.

Here is another thing you can try.

The background for the login window is kept in

/Library/Caches/com.apple.desktop.admin.png

Try deleting that file:

In the Finder, press Command-Shift-G, type

/Library/Caches/

and press enter. Drag the com.apple.desktop.admin.png file to the trash.

You should have to enter your password.

Then restart your mac and see how it goes.

Reply

Answer 2

Jun 20, 2018 9:47 AM in response to PaulBKK19

Since you are the only user, the id is 501. That is also confirmed by the fact that your background is used, blurred, in the login window.

Can I ask you to do another test?

Try restarting in Safe Mode, and see if the grey screen also happens when you wake your mac from sleep in Safe Mode.

If it works correctly while in Safe Mode, then the problem is caused by something that runs in your account when booted normally - a login item, launch agent or daemon.

In that case, please run the diagnostic tool Etrecheck, and post its report here so we can look for possible suspects.

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Answer 3

Jun 30, 2018 3:42 AM in response to PaulBKK19

Cleanmymac claims another victim.

Completely uninstall "cleanmymac" following the developers' instructions.

There is no way of knowing what damage this has caused already, so probably in the end

you should do a clean install of the OS, but for now uninstall this **** software and see how things go.

Another thing: you have parts but not all of the wacom software. There are launch agents but the necessary kernel extension is blocked (awaiting for your approval).

If you want to approve it, go to System Preferences->Security and Privacy->General, and click "Approve" next to the aforementioned extension.

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Answer 4

Jun 17, 2018 2:35 AM in response to PaulBKK19

After you login, do you see the desktop background you expected?

Try changing your desktop image to something else and then back.

This is done in System Preferences->Desktop & Screensaver.

Reply

Answer 5

PaulBKK19 Author

Level 1

4 points

Jun 29, 2018 8:39 PM in response to Luis Sequeira1

Dear Luis Sequeira,

Paul here sorry for my late reply been busy with work.

To give you an update on the issue .. I have tried restarting my MacBook in Safe Mode & the issue does occur after waking up from Sleep in Safe Mode as well.

I just ran the diagnostic tool Etrecheck & post the report below for you help sort out the issue.

EtreCheck version: 4.3.2 (4D034)

Report generated: 2018-06-30 10:33:33

Download EtreCheck from https://etrecheck.com

Runtime: 4:15

Performance: Good

Problem: Other problem

Description:

Lock Screen Wallpaper Background is all Grey

Major Issues:

Anything that appears on this list needs immediate attention.

Time Machine backup out-of-date - The last Time Machine backup is over 10 days old.

Minor Issues:

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

Time Machine auto backup disabled - Time Machine auto backups are disabled.

Kernel extensions blocked - There are blocked kernel extensions awaiting user approval.

Clean up - There are orphan files that could be removed.

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

32-bit Apps - This machine has 32-bits apps that may have problems in the future.

Hardware Information:

MacBook Air (13-inch, Early 2015)

MacBook Air Model: MacBookAir7,2

1 1.6 GHz Intel Core i5 (i5-5250U) 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 = 27

Video Information:

Intel HD Graphics 6000 - VRAM: 1536 MB

Color LCD 1440 x 900

Drives:

disk0 - APPLE SSD SM0128G 121.33 GB (Solid State - TRIM: Yes)

Internal PCI 5.0 GT/s x4 Serial ATA

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

disk0s2 121.12 GB

disk1s1 - Macintosh HD (APFS) 121.12 GB (77.51 GB used)

disk1s2 - Preboot (APFS) [APFS Preboot] 121.12 GB (21 MB used)

disk1s3 - Recovery (APFS) [Recovery] 121.12 GB (518 MB used)

disk1s4 - VM (APFS) [APFS VM] 121.12 GB (2.15 GB used)

Mounted Volumes:

disk1s1 - Macintosh HD 121.12 GB (40.80 GB free)

APFS

Mount point: /

disk1s4 - VM [APFS VM] 121.12 GB (40.80 GB free)

APFS

Mount point: /private/var/vm

Network:

Interface Bluetooth-Modem: Bluetooth DUN

Interface en0: Wi-Fi

802.11 a/b/g/n/ac

One IPv4 address

Interface en2: Bluetooth PAN

Interface bridge0: Thunderbolt Bridge

System Software:

macOS High Sierra 10.13.5 (17F77)

Time since boot: Less than an hour

System Load: 1.37 (1 min ago) 3.75 (5 min ago) 2.43 (15 min ago)

Security:

System	Status
Gatekeeper	Mac App Store and identified developers
System Integrity Protection	Enabled

Unsigned Files:

Launchd: /Library/LaunchAgents/com.oracle.java.Java-Updater.plist

Executable: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Resources/Java Updater.app/Contents/MacOS/Java Updater -bgcheck