SD card reader not working on high sierra

Seriously. Though the thread title should be changed to be more specific to the Mac Mini. People are responding to off topic posts with solutions for all sorts of things because they don't read the original post.

Actually, since the 2010 Mini is officially obsolete and this is pretty clearly a firmware issue, there's little hope for a fix other than perhaps a downgrade to Sierra. So the thread might as well be closed. Really a shame.

I agree. Mac mini 2010 apparently is not fully compatible with macOS High Sierra. No resets of anything nor safe boot don’t help. The issue remaining is why Apple claims the Mac Mini 2010 to be High Sierra compatible. For us Mac Mini 2010 users the macOS Sierra remains the last fully compatible operating system so far.

I can see the card in the System Report, but can't mount the chip. Similarly, I can't get photos loaded into Aperture from my iPhone or Camera, and USB drives aren't working.

I had thought there was just something wrong with the jump drive I had been given until I saw the answers here and realized my chip reader was exhibiting a similar problem. What fresh **** is this?

I found that the maker of my card reader, Transcend had issued a firmware update. I did not expect a firmware update for a card reader. Live and learn!!!

I would add that it did not solve the problem, though it may for some people. My Mac is just 10 days old so Apple Care is looking into the problem, having tried all the mentioned fixes whilst on the phone today. It's now been passed over to the Tech Team, hopefully an answer will be forthcoming next week.

Interestingly when I plug in my old wired USB Mac keyboard and then plug the card reader into one of the keyboard USB sockets the card reader works perfectly.......now that I find pretty epic! Confused Apple Care as well!

@Peter, it's been well established though the discourse of this topic discussion that this thread's issue has been isolated to certain Mac models (specifically 2010 Mac minis). The INTERNAL card reader on those specific Mac models are disabled when people upgraded to Mac OS High Sierra, despite Apple's claims that these Macs would support OS 10.13.x High Sierra. External card readers, such as the one you referred to, is not the issue being addressed here (as it's been well established that people with the disabled INTERNAL card readers can use external readers as a workaround). If your external card reader had an issue, and you found a solution, please start a new thread as this one is focused on the loss of functionality of Apple's own built-in internal SD card reader after upgrading to 10.13.x (High Sierra) - i.e. a completely different one than that of your external card reader.

Same problem here. macmini (mid 2010) Sd card not working after high sierra update. Apple says nothing

Well of course it's a software issue -- this only happened after the upgrade to High Sierra. It worked fine before then. And yes, the Mac recognizes the card reader.

Helpfull thanks for your comment.@jhon galt hope it it will fix the problem.

An SMC Reset has been known to fix that problem

I'm afraid I don't have an answer for you then. All I know is that SD cards including SDXC cards continue to work on my Macs. Try a different one.

I have a 2014 MacBook Air with High Sierra 10.13. A 16GB SDHC (FAT32) card mounts, and permits read, and write of files to it. Ejects normally.

Same here, several different SD cards, all same thing since "upgrading." Frustrating!

No issue using my 2012 Mini.

I have the same issue. MacBook Pro, early 2011. I tried SMC reset without success.

Same here. Mac mini (mid 2010) card reader not working since update. Tried the SMC reset several times - nothin'