Delayed boot-up with external HDD and compatibility?

Discussion in 'iMac' started by Truthfulie, Mar 7, 2014.

  1. Truthfulie macrumors regular

    Dec 18, 2013
    I have USB 3 external HDD hooked up to an iMac. It seems like if I have the external drive, the initial boot-up takes several seconds more. external drive has no OS X installation and Start-up Disk, in System Settings, is set to internal SSD and no other drives even show as an option. Is this issue caused by ANY external drive? or could this vary between external drives? I am using Lacie's 3TB HDD.
  2. hfg macrumors 68040


    Dec 1, 2006
    Cedar Rapids, IA. USA
    I think you will see slight delays when any external disk drive is attached. I assume the OS has to check them all for a bootable OS as part of the selftest startup routine.

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