SD card reader stops working until a reboot

My SD card reader will stop working until I do a reboot and then it works again. All of the SD cards are readable for quite some time, then the reader stops and I can't read any card until I reboot the Mac.

iMac 21.5″, macOS 12.6

Posted on Sep 30, 2022 01:43 AM

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3 replies

Oct 1, 2022 04:28 PM in response to ksaro1

Hello ksaro1,


To help isolate the issue, disconnect external devices connected to your Mac and then test the behavior. Additionally, testing with an external reader can further help isolate the behavior.


Reach out to Apple Support directly for further assistance with the behavior if the issue persists: Contact Apple for support and service - Apple Support


Kind regards.

Oct 2, 2022 01:04 AM in response to Chris_D13

Chris_D13 wrote:

Hello ksaro1,

To help isolate the issue, disconnect external devices connected to your Mac and then test the behavior. Additionally, testing with an external reader can further help isolate the behavior.

Reach out to Apple Support directly for further assistance with the behavior if the issue persists: Contact Apple for support and service - Apple Support

Kind regards.

Unfortunately the internal HDD that the iMac model that I have is that slow that it renders the iMac unusable. Therefore, I've had to attach an external SSD as the boot disk so that I can use my iMac. So I can't remove all external devices or my iMac won't boot.

I've raised this issue mainly in case others also are seeing this same behaviour. This behaviour has only occurred since I've been using Monterey. It could also be a H/W issue that just coincided with the Monterey installation.

Also, based on personal experience with the Apple Support infrastructure and their results on other issues, I won't be spending any of my time troubleshooting this issue.

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SD card reader stops working until a reboot

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