Time Machine Back Up on Tahoe

Downloaded Tahoe successfully. No issues or problems that I've detected so far. First back up on Le Cie Portable HD (Plenty of available space) overnight, did not complete. Seems to have completed this morning, now running additional back up, it's at 36% after about 4 hours. Why is it taking so long?

MacBook Pro 16″, macOS 26.0

Posted on Sep 16, 2025 3:43 AM

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Posted on Sep 19, 2025 9:11 AM

rk_bapple wrote:

Many times. Reformatted the disk, did everything I know..... Trying again now from reformatted disk. 80% after 6 hours....


I encountered problems with this disk BEFORE installing Tahoe


you are kidding me right(?) it should reformat within seconds not hours.


I would say your Disk is working in a state of failure. I would replace it.

9 replies
Question marked as Top-ranking reply

Sep 19, 2025 9:11 AM in response to rk_bapple

rk_bapple wrote:

Many times. Reformatted the disk, did everything I know..... Trying again now from reformatted disk. 80% after 6 hours....


I encountered problems with this disk BEFORE installing Tahoe


you are kidding me right(?) it should reformat within seconds not hours.


I would say your Disk is working in a state of failure. I would replace it.

Sep 16, 2025 11:17 AM in response to rk_bapple

reimeeed263 wrote:

Downloaded Tahoe successfully. No issues or problems that I've detected so far. First back up on Le Cie Portable HD (Plenty of available space) overnight, did not complete. Seems to have completed this morning, now running additional back up, it's at 36% after about 4 hours. Why is it taking so long?


How are you connected to the external...(?)


Try a different port—


NOT the DFU port and compare your results:

ref How to identify the DFU port on Mac - Apple Support


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Time Machine Back Up on Tahoe

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