Time Machine on iMac M3 ejects randomly after Tahoe OS 26.2 update
After updating my M3 iMac to Tahoe 26.2, Time Machine starts backing up and then stops.
I tried two different external hard drives, including a 2TB SanDisk Portable SSD. The brand-new SSD had the same problem right from the first backup.
I tried connecting the drives to both the Thunderbolt and regular USB ports, but nothing worked.
Thanks to anyone who can help.
Many "portable" drives draw more power than the USB is spec'd to support. That will cause the port to temporarily shut down, ejecting the drive. There are Y-cables that allow you to draw power from two ports and data travels over one of them. A powered hub may work better, not requiring two ports on the Mac.
Many "portable" drives draw more power than the USB is spec'd to support. That will cause the port to temporarily shut down, ejecting the drive. There are Y-cables that allow you to draw power from two ports and data travels over one of them. A powered hub may work better, not requiring two ports on the Mac.
Have you tried a different cable? Is the Mac inactive when the issue occurs, such that it is entering Sleep mode?
I regularly use Time Machine to back up multiple Macs in the house, including two running Tahoe, to a pair of 4 TB SSDs and have had no issues.
Do you have the 2 or 4 port M3 iMac model..?
If you are connecting the SSD(s) to a Hub or a Dock..?
Please identify the make/model and what other devices are connected to it.
I have 4 port M3 iMac.
I have connect external hard disks for Time Machine directly to the iMac (no dock or hub) I have try all port with usb-usbc adapter. In the Mac is connected also my printer HP laser jet.
thank you
Hello, Yes I change cable but I have the same problem. Have you got an iMac M3 ?
No, several MacBook Pros and a MacBook Air (all Apple Silicon).
Time Machine on iMac M3 randomly ejects after OS update
