Fix dependency installation on OS X

electron.js

@@ -113,7 +113,7 @@ function createWindow() {
   });
 
   const appPath = (os.platform() === 'win32') ? path.resolve(path.join(app.getAppPath(), '..\\..\\repertory-ui.exe')) :
-    (os.platform() === 'darwin') ? app.getAppPath() :
+    (os.platform() === 'darwin') ? path.resolve(path.join(path.dirname(app.getAppPath()), '../MacOS/repertory-ui')) :
     process.env.APPIMAGE;
 
   const autoLauncher = new AutoLaunch({
@@ -277,21 +277,25 @@ ipcMain.on(Constants.IPC_Check_Dependency_Installed, (event, data) => {
   try {
     const exists = fs.lstatSync(data.File).isFile();
     standardIPCReply(event, Constants.IPC_Check_Dependency_Installed_Reply, {
-      Exists: exists,
+      data: {
+        Exists: exists,
+      },
     });
   } catch (e) {
     standardIPCReply(event, Constants.IPC_Check_Dependency_Installed_Reply, {
-      Exists: false,
-    }, e);
+      data : {
+        Exists: false,
+      },
+    });
   }
 });
 
 ipcMain.on(Constants.IPC_Check_Dependency_Installed + '_sync', (event, data) => {
   try {
-    const exists = fs.lstatSync(data.File).isFile();
+    const ls = fs.lstatSync(data.File);
     event.returnValue = {
       data: {
-        Exists: exists
+        Exists: ls.isFile() || ls.isSymbolicLink(),
       },
     };
   } catch (e) {
@@ -589,7 +593,7 @@ ipcMain.on(Constants.IPC_Grab_UI_Releases, (event) => {
 ipcMain.on(Constants.IPC_Install_Dependency, (event, data) => {
   if (data.Source.toLowerCase().endsWith('.dmg')) {
     helpers
-      .executeAsync('hdiutil', ['attach', data.Source])
+      .executeAsync('open', ['-a', 'Finder', '-W', data.Source])
       .then(() => {
         standardIPCReply(event, Constants.IPC_Install_Dependency_Reply, {
           Source: data.Source,