Thank you, after diabling SIP and mounting with "sudo mount -uw /" worked. I was able to collect kernel debug core for further analysis and fixed my crash issue.For second error, I had to use older Xcode 9.4.1 in order to support MAC OS 10.14.x OS.Here, is the link that I followed,https://forums.developer.apple.com/thread/123207
lakshmi_s
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