Caps Lock light not illuminating on iMac keyboard after waking from sleep

Question

Level 1

21 points

Caps Lock light not illuminating on iMac keyboard after waking from sleep

OS 12.7.6

After waking my iMac from sleep, the caps light does not illuminate when pressed, although it does switch from lower case to caps when typing. I then have to turn the keyboard off and then on to get the caps light working again.

But if I lock the screen and then unlock it, the caps light illuminates, as it should.

I tried removing the keyboard in Bluetooth preferences and then reconnecting, but that didn't solve the issue.

[Re-Titled by Moderator]

Original Title: Caps Lock light issue

iMac 27″, macOS 12.7

Posted on Oct 14, 2025 12:19 PM

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Answer 1

rkaufmann87

Level 10

148,314 points

Oct 14, 2025 12:57 PM in response to soulartist

Please restart the computer in Safe Mode ( Safe Mode ) with the keyboard's charging cable plugged into the back of the iMac and the keyboard. Hold down the Shift key on restart until the compute fully starts in Safe Mode (indicated in upper right of the display) and then restart normally and test.

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Answer 2

Old Toad

Level 10

214,758 points

Oct 16, 2025 1:58 PM in response to soulartist

Starting in Safe Mode does the following:

NOTE 1: Safe Mode boot can take up to 3 - 5 minutes as it's doing the following;

• Verifies your startup disk and attempts to repair directory issues, if needed

• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)

• Prevents Startup Items and Login Items from opening automatically

• Disables user-installed fonts

• Deletes font caches, kernel cache, and other system cache files

A cache file can get damaged/corrupted and repairing/replacing it can fix issues.

NOTE 2: if you have a wireless keyboard with rechargeable batteries connect it with its charging cable before booting into Safe Mode. This makes it act as a wired keyboard as will insure a successful boot into Safe Mode.

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