Slow Boot Up on Mojave - External USB SSD

Loner T hope you are out there. I just upgraded my iMac to Mojave and now the system is booting extremely slow. I have my Mac OS on an external USB SSD drive and my data files on the internal 1 TB drive. The system was working perfect until recently. I did a backup and then wiped the drive completely and reinstalled Mojave and it is still having issues. Not sure where to start. The system does appear to function fine once booted up and logged in. I was planning on running Bootcamp the iMac but with all of the issues I decided to keep running Fusion.

Thanks!

iMac (27-inch, Late 2013), OS X El Capitan (10.11.3)

Posted on Oct 4, 2018 5:04 PM

Top-ranking reply

iz2lsc

Level 1

8 points

Posted on Oct 10, 2018 5:32 AM

The problem is APFS. I installed Mojave on my external USB SSD disk (SanDisk) and it was automatically converted to APFS. Boot time were > 2 min.

After that I converted back the SSD to HFS+ using the Paragon converter and boot time went back to normal, with Mojave. So I hope that Apple will find a fix for this APFS issue soon.

Andrea.

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Slow Boot Up on Mojave - External USB SSD

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