Hey Cas,
No, there isn't. You could copy the Linux & Windows implementations from LWJGL 2, they're pure java. The macOS implementation depends on the com.apple.eio.FileManager API, that has been removed from JDK 9+ afaik. A solution based on Desktop would be problematic with GLFW, because it initializes AWT. I don't know how BrowserLauncher works.
One solution for macOS would be to launch a separate Java process that uses Desktop (or anything else that depends on AWT) to open the browser, then die immediately.
A solution based on LWJGL 3 would be to use the Obj-C Runtime bindings:
long objc_msgSend = ObjCRuntime.getLibrary().getFunctionAddress("objc_msgSend");
// Implements the following Obj-C code using the Obj-C Runtime:
// [[NSWorkspace sharedWorkspace] openURL:[NSURL URLWithString: @"https://www.lwjgl.org"]];
try (MemoryStack stack = stackPush()) {
long string = CFStringCreateWithCStringNoCopy(NULL, stack.UTF8("https://www.lwjgl.org"), kCFStringEncodingUTF8, kCFAllocatorNull);
long sharedWorkspace = invokePPP(objc_msgSend, objc_getClass("NSWorkspace"), sel_getUid("sharedWorkspace"));
long url = invokePPPP(objc_msgSend, objc_getClass("NSURL"), sel_getUid("URLWithString:"), string);
int result = invokePPPI(objc_msgSend, sharedWorkspace, sel_getUid("openURL:"), url);
System.out.println("SUCCESS: " + (result != 0 ? "YES" : "NO"));
CFRelease(string);
}
Tested with LWJGL 3's Gears sample, appears to be working fine.