Follow AppleInsider, some users report the device can access the SD card, but the transfer speed seems unusually slow. Other users say even tagging is inconsistent and even impossible to track between manufacturers or models.
Problem with SD card on MacBook Pro 2021 of unknown cause
The problem started being reported on the forums of MacRumors, where the user says there seems to be no reason why the card works or doesn’t work. A forum member named wilberforce noted that issues related to brand, size, type, format or age could not be found. This person also said he can access 100% of the SD card with a third-party external card reader.
Another user said it can take up to a minute for the device to successfully link the SD card.
Also according to the December 6 report, although no underlying reason for the problems was found, many cases occur with older SD cards, and capacities below 128 GB seem to cause particular problems. .