Use my multimc instance from https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/mods-discussion/3028341-legacy-fabric-discussion-thread-for-versions
Add this to the dependencies block
if (System.getProperty("os.name").toLowerCase().contains("mac")) {
implementation 'org.lwjgl.lwjgl:lwjgl_util:2.9.4-nightly-20150209'
implementation 'org.lwjgl.lwjgl:lwjgl:2.9.4-nightly-20150209'