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How can I fix missing or lost partitions on Intel-based Mac OS X?

April 26, 2017Fix Intel-based Lost mac os x MISSING partitions

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How can I fix missing or lost partitions on Intel-based Mac OS X?

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Intel-based Mac OS X uses a combination of GPT and MBR partition tables. Sometimes when using older GParted versions to modify the partitions on a Mac, the GPT is changed but not the MBR. See Bug 586910 – MBR does not reflect the GPT partition map. This problem can be repaired with the rEFIt application.