I recently upgraded HDD to SSD on my mid-2012 macbook pro. After the SSD upgrade, the startup chime is delayed, causing slow booting of my mac.

Any potential pointers ?

  • 2
    Once booted, make sure the new drive is set as Boot in system prefs > startup disk. See if that speeds it up at all.
    – Tetsujin
    Mar 22, 2019 at 13:42
  • yes, I added new disk as boot disk, no change noticed though! Mar 22, 2019 at 13:57
  • OK, it was just a thought. tbh, my old Mac Pro takes a lot longer to reach the chimes than it used to. idk whether it's since I swapped to SSD or whether it was after an OS upgrade.
    – Tetsujin
    Mar 22, 2019 at 13:58
  • You can also enable TRIM in that SSD howtogeek.com/222077/… this may not speed things right now, but helps in the long run. Mar 22, 2019 at 14:02
  • 1
    How did you do this "conversion?" Did you clone the drives or did you do a clean install?
    – Allan
    Mar 22, 2019 at 14:17

1 Answer 1


Avoid cloning a HDD to a SDD

The problem with cloning is that you are making an exact copy of all the data on your drive at the block level - including the deleted data.

Spinning media acts and breathes differently than solid state media (i.e. TRIM support) and as such, you will be introducing problems for your SSD where none existed on the HDD.

What do do instead?

Do a clean install and utilize Migration Assistant to transfer your user data.

  • Disk cloning may have issues. However Samsung Data Migration/ Magician do similar work for data migration, or Apple utility is preferred for this task ? Mar 22, 2019 at 15:27
  • I can't speak to Samsung Data Migration as I've never used it, but Apple's M.A is designed specifically to move macOS user data from one place to another by Apple. I've used it countless times with no issues.
    – Allan
    Mar 22, 2019 at 15:30
  • Thanks Allan. I will try using Apple's M.A. and see if that solves the problem. Mar 22, 2019 at 17:51

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