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workingideas

macrumors newbie
Original poster
May 19, 2018
1
0
I installed Windows 7 Pro (64bit) on a secondary drive of my Macbook Pro (mid-2012), and some how it changed the status of my two connected drives as follows:

DRIVE 1 (1 TB): Mac OS, GPT, disk1
DRIVE 2 (2TB): W7Pro, GPT, disk0

So, while Windows will boot, I now cannot boot back into Mac OS unless I disconnect the secondary drive (where W7Pro sits).

I have since reformatted the secondary drive (now Mac OS Journaled/GPT) and will attempt to install Windows again (via Bootcamp), but am reluctant to do so since the primary drive (DRIVE 1 - Mac OS) still reads as "disk1" (i.e. not as "disk0", which it used to).

What are my options? I am assuming that I want my DRIVE 1 to be "disk0".

Thanks for any assistance, and/or pointers to threads that already address this issue (with best fixes).
 
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