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Question: External APFS Drive Causing Kernal Panic

I'm running 10.13.3 on 2 machines. A 2013 Mac pro and a 2013 Mac Book Pro retina. I have isolated these panics to a new 12TB Iron Wolf Pro in a an Orico single drive enclosure.


I decided to be cutting edge and set it up using the new APFS system and at first it seems to be working fine and running great. I have been moving data over to it using Carbon Copy Cloner, but today it starting causing kernel panics.


I tried both machines, new USB cable, nothing else connected, etc. Result is the same. The device will mount and seems to function at first but after that the system panics. If I try to open disk unity, the the panic seems to be immediate. I imagine there's a log of this if anyone wants to see it, but I have confirmed that it only happens when the external drive is plugged in.


Any ideas?

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Mar 16, 2018 1:07 PM in response to Kappy In response to Kappy

Yes this is an HDD, not an SSD. I too have read the articles about AFPS on an HDD. But apple supports formatting it as such and I have seen nothing from them saying to restrict it's use. I have heard concerns on speed and access issues. But do we have reason to believe (other than what I am seeing here) that using APFS on a traditional HDD will cause Kernal Panics?

Mar 16, 2018 1:07 PM

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Mar 16, 2018 1:28 PM in response to Gavin Seim In response to Gavin Seim

APFS adds nothing for an HDD that you need other than it's not nearly as well-tested as APFS on SSDs. Here are some concerns:


macOS may lose data on APFS-formatted disk images

Is APFS fully supported yet? – The Eclectic Light Company

Can APFS be used with Time Machine, Boot Camp, and File Vault?


As for the kernel panics when you attach this new drive I would talk with the manufacturer's tech support for help.

Mar 16, 2018 1:28 PM

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Question: External APFS Drive Causing Kernal Panic