We currently don't support case-sensitive partitions
This is a common Mac crash that has been occurring since 4.15. It shares the same callstack with [Link Removed], but that was verified fixed for 4.16.0, while this crash still continues into 4.16.1.
Additional information is not currently available.
Install the engine on an external drive formatted as case-sensitive.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-45821 in the post.