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<< Solved >> Dual boot issue - Mojave and win 10

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Nov 16, 2010
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CPU
i7-7900K
Graphics
RX 580
Having a strange dual boot issue on my new build. I have Mojave installed successfully on a Samsung 970 pro NVME SSD. This system previously had an install of Windows 10 on a Samsung 960 pro. If I put the 960 back in the system in addition to the 970 to try and dual boot, Mojave will crash once the progress bar under the apple logo gets a bit past halfway. If I remove the 960 with windows on it from the system then Mojave will boot fine.

I've tried booting Mojave in verbose mode with he 960 in the system and don't see anything suspect before the system crashes but can try and get a screenshot of that if anyone is curious.

Any ideas?
 
This one ended up being kinda obvious in hindsight. Mojave is installed on an APFS fusion drive. With the 960 (windows 10) was in the system its M.2 slot was stepping on the SATA port I had the spinning disk for the fusion drive hooked up too. Once I RTFM and found which SATA ports I could actually use with both M.2 slots populated I'm good to go.
 
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