Fix launching for DownloadAssistant editors

Author: Ravbug

source/interface_derived.cpp

@@ -340,6 +340,20 @@ void MainFrameDerived::OpenProject(const long& index){
 
 			return;
 		}
+#if __APPLE__
+        else if (filesystem::exists(path / executable)){
+            // mac unlabeled version
+            auto unlabeledPath = path/executable;
+            char buffer[16];
+            auto unlabeledPathInfo = path / "Unity.app" / "Contents" / "Info.plist";
+            getCFBundleVersionFromPlist(unlabeledPathInfo.string().c_str(), buffer, sizeof(buffer));
+            if (p.version == buffer){
+                string cmd = "\"" + unlabeledPath.string() + "\" -projectpath \"" + p.path.string() + "\"";
+                launch_process(cmd);
+                return;
+            }
+#endif
+        }
 	}
 	//alert user
 	wxMessageBox("The editor version " + p.version + " could not be found.\n\nCheck that it is installed, and that the folder where it has been installed is listed in the Editor Versions tab, under Install Search Paths.", "Unable to start Unity", wxOK | wxICON_ERROR);