MacBook Air and MacBook Pro: Solid State Drive (SSD) media capacity

Summary

Learn about the total capacities of the Solid State Drives (SSD) used with MacBook Air and MacBook Pro.

Products Affected

MacBook Air, MacBook Pro

  • The 64 GB Solid State Drive (SSD) should have a total of 60.02 GB of capacity.
  • The 128 GB Solid State Drive (SSD) should have a total of 121.33 GB of capacity.
  • The 256 GB Solid State Drive (SSD) should have a total of 251 GB of capacity.
  • The 512 GB Solid State Drive (SSD) should have a total of 500.28 GB of capacity.

You can check your drive capacity by running the Disk Utility in your Applications folder.

Additional Information

These items may account for the additional space used in your Solid State drive:

  • EFI Partition
  • Wear-leveling blocks
  • Write-buffer area
  • Metadata
  • Spare blocks
  • Grown bad blocks
  • Factory bad blocks

For a detailed description about the difference between capacity numbers, refer to Apple products and storage drive manufacturers report drive capacity differently.

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