All tests that load libawt are hanging in JPRT on Mac. There are 2 tests in the jdk_lang batch that need to be excluded to allow the default testset to pass:

closed/java/lang/ClassLoader/CheckClassName.sh
closed/java/lang/SecurityManager/Default.java

These tests should be removed from the ProblemList once it is figured out how to configure the Macs in JPRT.