00:21:15.284 JOSM NSString *findJREDylib(int, _Bool, _Bool) JRE search exception: 'launch path not accessible' 00:21:15.283 JOSM NSString *findJavaDylib(NSString *, _Bool, _Bool, _Bool, _Bool) Searching for a JRE. $ /Users/rschmidt/Downloads/josm-macosx/JOSM.app/Contents/MacOS/JOSM exit OpenJDK 64-Bit Server VM AdoptOpenJDK (build 12.0.2+10, mixed mode, sharing) OpenJDK Runtime Environment AdoptOpenJDK (build 12.0.2+10) JOSM was just submitted to MacPorts and I approved the submission even though the problem reported in this ticket also happened to me during testing. 11:19:00.775 JOSM int launch(char *, int, char **) Error launching JVM Runtime ((null)) Relative Path: '(null)' (dylib: (null)) 11:19:00.773 JOSM int launch(char *, int, char **) Launchpath: (null) 11:19:00.773 JOSM NSString *findJavaDylib(NSString *, _Bool, _Bool, _Bool, _Bool) No matching JRE or JDK found. 11:19:00.705 JOSM NSString *findJREDylib(int, _Bool, _Bool) JRE search exception: 'launch path not accessible' 11:19:00.704 JOSM NSString *findJavaDylib(NSString *, _Bool, _Bool, _Bool, _Bool) Searching for a JRE. When i launch it from termital i see MacOS %. I could launch: java -jar josm-snapshot-15492.jar using snapshot bundled inside JOSM.app, but when I'm trying to launch JOSM.app itself it shows an error: JRE load error as window. OpenJDK 64-Bit Server VM (build 13.0.1+9, mixed mode, sharing) OpenJDK Runtime Environment (build 13.0.1+9) After that java is available in Java % java -version It's installed using 'brew cask install java'.

I'm using OpenJDK during my work and keep it as only available java on my macOS.

Brew openjdk