Hi Chiragkumar,
I'm really sorry, but unfortunately we don't support CDH 5.7 yet. You can of course check logs on Mac here:
/Users/[user]/Library/Containers/com.dell.ToadForApacheHadoop/Data/.dell/ Toad for Apache Hadoop/[version]/log/log4j.log
/Users/[user]/Library/Containers/com.dell.ToadForApacheHadoop/Data/.dell/ Toad for Apache Hadoop/[version]/.metadata/.log