When I try to set up MCreator, it gives me the error code: MCREATOR_SETUP_FAILED. It's not very descriptive. I'm running JRE 8 update 191 and macOS 10.14 if that helps. Error log:
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Build info: MCreator 1.8.1, 64-bit, 16384 MB, Mac OS X - bash, JVM 1.8.0_191, JAVA_HOME: Default (not set)
FAILURE: Build failed with an exception.
* What went wrong:
Could not determine java version from '10.0.1'.
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
Task completed with return code 1 in 1444 milliseconds
It seems that you have Java 10 installed too and set as the default Java on your system based on this error. And MCreator needs JDK, not JRE. I suggest you uninstall Java 10 and install JDK 8. Check this page for more info: https://mcreator.net/install/mac