MacBook Air: How to correct an HDD or SSD that shows lower than expected capacity
Symptoms
Some MacBook Air computers may show hard disk drive (HDD) and Solid State Drive (SSD) capacity below expected levels. When using the MacBook Air for the first time, customers may see a disk full error message or an HDD/SSD capacity that is lower than normal.
Products Affected
MacBook Air (Original)
Resolution
To correct the issue follow the steps below.
Warning: Be sure to create an external backup of any data on your hard drive prior to following these instructions.
- Start up using the MacBook Air Install Discs.
- Go to Disk Utility and erase the HDD/SSD, in Mac OS Extended (Journaled) format.
- Once the drive is erased, use the MacBook Air Install Discs to reinstall the Macbook Air software.
This solution resolves the issue permanently so there is no need for repair.
Additional Information
If you do not have an SSD, please refer to this article for a detailed description of why the discrepancy occurs with HDD.
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