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Seagate external drive visible in System Report but cannot be mounted on desktop -- how to fix?

Tried on Catalina (late 2013 iMac) and on Sonoma (2021 iMac) but no success on either machine. Tried with new USB cable, can hear the disk spin up, but it remains invisible in Disk Utility.

iMac 27″, macOS 10.15

Posted on Nov 25, 2023 9:07 AM

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2 replies

Nov 25, 2023 9:22 AM in response to thorgod

+1 I have to agree the drive has likely failed. Assuming you have been backing up, you can restore the data on it. Next time around, please buy a high quality enclosure such as a OWC Mercury Elite Pro. The "Walmart" quality enclosures sold at big box stores tend to be sealed and very low quality. Enclosures like the one suggested has lots of venting and cooling which translates into higher reliability.

Seagate external drive visible in System Report but cannot be mounted on desktop -- how to fix?

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