Some readers who have contacted Apple have been told that the company is aware of the issue and that a fix is coming in a future software update, but it is not clear if this is a hardware issue or a software issue. 100% of my cards work perfectly via a dongle. Sandisk, Sony, Samsung, 16GB, 32GB, 64GB, 128GB, 256GB, UHS-I, UHS-II, micro-SD, FAT32, exFAT, makes no difference. Reformatting, even to all other possible formats, makes no difference. The only thing that is consistent is that if a card works, it always works, and if a card does not work properly it never works properly.

I tried many cards, and could find no pattern of brand, size, type, format, age.

There also does not seem to be a common thread between which cards work and which do not, but multiple users have reported that using an SD card reader over USB-C works when the SD card slot does not. Sometimes the Finder crashes too.īased on the thread, formatting does not appear to be the issue, though it could be a factor. But Photos on the MBP using the internal SD card slot takes minutes to show photos and sometimes crashes half way through. I have a fairly new 64GB SD card which had been working fine. I was hoping that import from SD card including preview of images would be quick on my new 14' MBP. In some situations, there's just an error message when attempting to use the SD card, sometimes Finder crashes, and sometimes the SD card takes many minutes to be accesible. All my cards work as expected in my 3 other USB card readers. I tried reformatting them w/ the MBP and that didn't seem to make a difference. These are all Sandisk Ultra cards, both XC and HC, that were formatted in my camera. Half the time it'll recognize the card successfully (though it takes anywhere from 30s to 1m) and half the time it'll throw an error. Just seems to be super flakey and inconsistent.

MacRumors reader Wildc t explains the issue: Some SD cards crash and can't be accessed, while some have unusually slow transfer speeds. In a long complaint thread, MacRumors readers have detailed the issues that they're having with some SD cards, and there seems to be little consistency between reports and affected SD cards. The SD card reader slot on the new 14 and 16-inch MacBook Pro models is not functioning as expected with some SD cards, according to multiple reports on the MacRumors forums.

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