OS on external USB key - how fast is it?

Discussion in 'Mac mini' started by arnaud.mar, Sep 16, 2014.

  1. arnaud.mar macrumors newbie

    Sep 16, 2014
    I am thinking of installing my system on a 64Gb external USB key 3.0 and I wonder if this will make my Mac run faster (My system is currently installed on the internal HDD [1Tb, 5400 rpm] of my MacMini)

    Do someone have any experience on this?

    Thanks in advance for your help, :)
  2. jbarley macrumors 68040


    Jul 1, 2006
    Vancouver Island
    I keep a cloned backup on a USB3 key, for emergency restore purposes only.
    I serves its purpose as such but it is way-way too slow for regular use.
  3. crsh1976 macrumors 6502a

    Jun 13, 2011
    Not a good idea, and it sure won't be faster (not after a while, no TRIM and garbage collection on such a device); using a SSD in a USB 3 external case however would give you the speed and sturdiness you're looking for.

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