os catalina no option to partition external hard drive

Hi, I just got a new external hard drive - Toshiba Canvio Basics 1TB.

I have reformatted it to Mac OS Extended (Journaled).

I want to partition it but the partition tab is greyed out.

Any suggestions?

Thanks for reading

Posted on Oct 31, 2019 8:11 AM

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1 reply

baguette123 Author

Level 1

4 points

Oct 31, 2019 8:28 AM in response to baguette123

Ok, figured it out. Didn't notice the option to change to GUID or Apple from master boot record

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os catalina no option to partition external hard drive

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