You can make a difference in the Apple Support Community!
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.
I just updated my iMac M1 to run Sequoia and now my USB flash drives are not recognized. My external hard drives are recognized as are my external SSD's. I have seen online that I am not the only one with this issue, but nowhere have I found a fix. Is this something that can be fixed or do I have to wait for a update?
iMac 24″, macOS 15.0
This is driving me nuts. After initially updating to Sequoia yesterday on my M2 Macbook Pro, my USB Dongle device initially mounted fine, automatically. Today it won't mount automatically.
It's recognized, in that I can see the device in Disk Utility. However, the button to mount in Disk Utility does not work.
I can only seem to mount the device through Terminal by performing the following steps:
1) Call up the disk utility list
diskutil list
2) Find the DriveIdentifier for the USB device in the list
3) Create a Volume to mount the device:
sudo mkdir /Volumes/YourVolumeName
4)Mount the device to this volume
sudo mount -t msdos /dev/DriveIdentifier /Volumes/YourVolumeName.
It's a USB2.0 device plugged into an apple USB-C multiport adaptor, the drive is FAT32 formatted. Allow Accessories to connect is set to Always. Finder settings are on to show External Disks in Locations on the sidebar.
And the kicker: This same USB device mounts automatically w/o issue on my M1 Mac Studio updated to Sequoia the same day! What gives Apple? Please address this issue ASAP. We should not have to run terminal commands to mount USB drives. This is not a viable work around for users who do not have admin permissions. Thank you.
Similar issue. Mac Studio M1 will not mount an XQD card (Formatted in Nikon Camera) and USB flash drives. SD cards in the Mac Studio slot work just fine. All worked smoothly before updating to Sequoia.
All cards and USB's show in Apple System Report with all details. Tried all the reboot etc tricks.
I have been in touch with Apple. Escalated case to OS engineers. Hopefully there will be a solution shortly. Very inconvenient.
DavidWMB wrote: "...What's up with Apple? Do they even know and care what's going on?"
Make sure they know:
õ¿õ¬
Usb drives still not working. Where are you now Steve Jobs when we need you?
On MackbbokPro M1, on Sequoia, One Drive on my Sat Nav (SD64), comes up unreadable, but shows in diskutility and can be mounted. However the main sat nav drive is greyed out and says uninitialised...however both work normally on an intel based 2019 27" iMac ... obviously I cannot reformat a Sat Nav drive, so no cannot update routes when travelling.
What a mess they made of it... any suggestions?
In my case the flash drive shows up in disk utility as Disk4.
In the Disk Utility you can mount it with the typed mount command, dismount or unmount is using the command and eject it using a typed command. It has a FDisk_partition_scheme of Windows_FAT_32
In Finder - Settings - General I have attempted the "Show these items on Desktop" and "Show these items on Sidebar" and the drive does not show.
I had to go dig into the sofa cushions to find a USB stick to try.
When I plugged it in, Finder gave me the this disk not recognized dialog. Figured it was just bad.
Tried formatting and then it worked fine. I don't know how it was formatted before.
If you can actually mount the drive using Disk Utility or Terminal, copy the data off and reformat. If it is a camera card, use the camera to format it.
I'll dig through some other furniture to see if I can find another to test.
I have been using SD cards on my M2 MacBook Pro without issue. The USB Stick I tested was on an M1 Mini.
I have updated to 15.01. Still no joy. So frustrating! Hasn't made any difference, except for making my MacBook more unstable and slow, with that dreaded spinning wheel when opening applications. What's up with Apple? Do they even know and care what's going on? Again, I have to reiterate that my biggest mistake was "updating" to Sequoia!!
In my case, the non-recognizing of USB drives occurs irrespective of whether the drives are plugged directly in the USB ports on my MacBook Pro with Sequoia OS, or indirectly through a USB hub, like the CalDigit docking station or USB hub.
None of this ever happened with Sonoma OS!!
It is absolutely ridiculous that Apple has not fixed this as yet with an update. How am I to work like this?!
having issues with external SSD's not mounting or visible . Also SD card not showing up or mounting on reader on my new Mac Studio M2 Ultra. New this week, all worked well on Sonoma, until I upgraded... Not impressed.
I had to go through Apple Support. They say they don't have any history of this issue with updating to Sequoia.
After trying many things, the support person had me upload the files from my Flash drive to my old computer, then using my MacBook Pro to erase my flash drives (that were already in FAT-32) and reformat my Flash drive with ExFAT. And finally, reload my flash drives with the files from my old computer.
It seems like a lot to have to go through for a system update. Especially for someone like me, who has a very basic understanding of how tech works. Trogander, you lost me on step 3 but I do appreciate all the detail you provided.
dwiser12u wrote:
I had to go through Apple Support. They say they don't have any history of this issue with updating to Sequoia.
That's bogus. Either Apple is lying or they maintain very crummy records.
I chatted with Apple Support for about 40 minutes on or around September 25, 2024. No solution, but the tech had me try a bunch of stuff, including re-booting into Safe Mode.
In Terminal, type the following:
ls /dev/tty./*
If you see something like /dev/tty.usbserial-xxx it may have found the USB port but can't communicate with it, if that makes any sense.
The xxx would be th port number
Tueso wrote: "Have any of the apple support team seen this post?"
Doubtful, considering thousands of daily posts and these being user-to-user communities. Use this form:
õ¿õ¬
A Store N Go very old USB is recognised after installation of Sequoia
The external is not recognized the external does not show at all in Disk Utility. That is what is happening.
Mac OS Sequoia not recognizing USB Flash Drives
