How to symbolicate crash report from Apple received in .txt format not .crash format

Question

My app got rejected from Apple and I have got crash reports in .txt format instead of .crash format.

How can I symbolicate or read the crash report ?

Answer 1

Can't add a comment to Shakti's answer, but I had trouble with steps 5 and 6 as it was complaining about DEVELOPER_DIR not being specified.

Some googling later I found out that the part 5 should have been:

5 now open terminal cd your folder path and then type this

export DEVELOPER_DIR="/Applications/Xcode.app/Contents/Developer"

So, the "export" is also a keyword and a part of the command, just in case anyone else gets the same problem.