How to remove master boot record

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Level 1

8 points

How to remove master boot record

I have a Seagate drive that I want to partition. I cannot use Partition in Disk Utility as its greyed out...the problem is a master boot record. What dio I do?

MacBook Pro, OS X 10.11

Posted on Mar 4, 2019 5:59 PM

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Answer 1

HWTech

Level 9

68,630 points

Mar 4, 2019 9:19 PM in response to paulque

Use the "Erase" tab in Disk Utility. IIRC there should be an "Options" or "Advanced" button which should allow you to change the partitioning type. I'm not at my Mac now to confirm.

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Answer 2

Mar 5, 2019 7:44 AM in response to paulque

Erase at the device level not at the volume level.

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Answer 3

paulque Author

Level 1

8 points

Mar 5, 2019 8:12 AM in response to HWTech

HWTech,

I couldn't get "Options" or "Advanced" for some strange reason - am running El Capitain...but the following from Bob has solved the problem - Master Boot Record gone, can now Partition!

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Answer 4

paulque Author

Level 1

8 points

Mar 5, 2019 8:13 AM in response to BobTheFisherman

Bob, thats done it! Thank you...been all round the houses on this one...now I can Partition this drive. Thank you

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Answer 5

Mar 5, 2019 8:15 AM in response to paulque

You're welcome.

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How to remove master boot record

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