How Much Faster Does a New SSD Make a 2012 MacBook Pro?

How Much Faster Does a New SSD Make a 2012 MacBook Pro?

Thursday March 01, 2018

How much faster does a new SSD make a 2012 MacBook Pro? A lot.

I recently upgraded a 2012 MacBook Pro with a new SSD, and I was blown away by the results. The computer was basically unusable before the upgrade - it took several minutes to boot (I wish I had timed it). It also wasn’t uncommon to wait multiple minutes for a program like Safari to launch. Apparently (based on online message boards, YouTube, etc.), lots of older MacBooks suffer from really slow responsiveness when running newer versions of macOS. The problem can be fixed pretty easily by replacing the OEM hard drive with an SSD - after the fix, the MacBook Pro boots in under 20 seconds and launches programs almost instantly.

Why does the SSD help so much?

The 2012 MacBook Pro comes with a 5400RPM hard disk, which is basically a bottom-shelf hard disk by modern standards. The low performance of the disk limits the speed that data can be read from or written to the disk. Basically, the MacBook runs slow because it can’t load it’s operating system and programs from the hard drive fast enough. This becomes really apparent on newer versions of macOS, where the time needed to boot the OS or load an application is really slow. In fact, the hard drive is so slow that it is the biggest bottleneck in the system.

Fortunately, this is easy to fix with a simple hard drive upgrade. Disk I/O on an SSD is more than 100 times faster than a 5400 RPM hard disk, so replacing the disk with an SSD makes all the performance problems due to disk I/O go away. The other components in the system have no problem keeping up, so the system shows huge performance improvements simply by upgrading the hard disk.

How can I upgrade my MacBook?

  1. Buy an SSD. Any SSD that’s 2.5” form factor should be easy to install in place of the old hard drive.
  2. Run a Time Machine backup to an external drive.
  3. Create a bootable macOS installer on a USB stick. We’ll use this to format our new drive and install the OS.
  4. Replace the hard drive with the new SSD.
  5. Boot the macOS installer USB stick, and open Disk Utility to format the new hard drive. Format the disk as “Mac OS Extended (Journaled)”.
  6. Now, use your USB stick again to install macOS. The installer will guide you through restoring your backup.


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