When I use forge for Mincreaft on Mac it crashes right after I click the play button. I have tried downgrading to Java 7, adjusting some files in the Forge.jar, and have also deleted everything and tried again multiple times. I am running Mac OSX 10.12.2 Sierra. I am also using the new stand alone launcher. however I have tried using the older launchers, and still no change. I took all the mods out of the mod folder, and no change there either.
Here is the crash log error I am recieving:
[21:08:51] [main/ERROR] [LaunchWrapper/]: Unable to launch[21:08:51] [main/ERROR] [LaunchWrapper/]: Unable to launchjava.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) ~[?:1.8.0_131] at java.util.ArrayList$Itr.remove(ArrayList.java:865) ~[?:1.8.0_131] at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
Please let me know why Forge is not working on minecraft.