My 1.16.5 forge installation keeps crashing no matter what I do. It was working perfectly fine until I closed minecraft to add some mods to it. I have tried closing and retrying to open the installation, reopening the launcher, changing it to another version and then back, and reopening with the latest version of forge 1.16.5. It gets to a red loading page before crashing. 

When it crashes this is what it says:

The game crashed whilst initializing game

Error: java. lang. IllegalStateException: GIFW error before init: 0x10008]Cocoa: Failed to find service port for display

Exit Code: 255

This is the crash report:

ava.lang.IllegalStateException: GLFW error before init: [0x10008]Cocoa: Failed to find service port for display
    at com.mojang.blaze3d.platform.GLX.func_229879_lam_(SourceFile:64) ~[?:?] {re:classloading}
    at net.minecraft.client.MainWindow.func_211162_a(MainWindow.java:131) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
    at com.mojang.blaze3d.platform.GLX._initGlfw(SourceFile:63) ~[?:?] {re:classloading}
    at com.mojang.blaze3d.systems.RenderSystem.initBackendSystem(SourceFile:1060) ~[?:?] {re:classloading}
    at net.minecraft.client.Minecraft.<init>(Minecraft.java:416) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
    at net.minecraft.client.main.Main.main(Main.java:149) ~[1.16.5-forge-36.2.34.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74] {}
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.5-36.2.34.jar:36.2] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?] {}

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
    at com.mojang.blaze3d.platform.GLX.func_229879_lam_(SourceFile:64) ~[?:?] {re:classloading}
    at net.minecraft.client.MainWindow.func_211162_a(MainWindow.java:131) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
    at com.mojang.blaze3d.platform.GLX._initGlfw(SourceFile:63) ~[?:?] {re:classloading}
    at com.mojang.blaze3d.systems.RenderSystem.initBackendSystem(SourceFile:1060) ~[?:?] {re:classloading}
    at net.minecraft.client.Minecraft.<init>(Minecraft.java:416) ~[?:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.main.Main.main(Main.java:149) ~[1.16.5-forge-36.2.34.jar:?] {re:classloading,pl:runtimedistcleaner:A}
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_74] {}
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_74] {}
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_74] {}
    at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_74] {}
    at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51) ~[forge-1.16.5-36.2.34.jar:36.2] {}
    at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.Launcher.run(Launcher.java:82) [modlauncher-8.1.3.jar:?] {}
    at cpw.mods.modlauncher.Launcher.main(Launcher.java:66) [modlauncher-8.1.3.jar:?] {}
btw I'm on a MacBook Air it that helps

 

We generally don't support old versions, but as this error is probably related to the M1 chip, I will provide an answer. If you're saying that it works fine without mods then failed after a mod was added, then there is probably a mod which causes the error to which you need to remove one-by-one or in batches to find. If that's not the case, it could be with the early progress window, to which you would need to add `-Dfml.earlyprogresswindow=false` to your java arguments in your profile. If that doesn't fix the issue, then you're better off updating to a later minecraft version where the issue is fixed within GLFW. You can attempt to rebuild Forge with the updated library, but you will receive no support for that here.

I don't know if I said this but I was playing with mods before I tried to add in the new one. Even after removing it and the others mods I still had the problem. I can try to do the second thing you recommend but I don't know how to do it.

Basically, go to your Installations, click the triple dots next to your profile and select Edit, click More Options, and then add the argument with a space in the JVM Arguments section.

Thank you so much its working again!