Dmg Quit Unexpectedly Mac Fix

We were receiving complaints from several users that they would lose the connection to their published applications when working on their Mac OS X devices. When working on these devices their published applications would suddenly be disconnected. The users would receive the following message:

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Whenever a program quits unexpectedly, document the application involved, the other things you had on at the same time, and the time. With this basic info, you'll have the basic data to begin investigating. If you have 2gb RAM, that's the problem. Upgrade to 4gb RAM minimum, and more if you feel you require it. To restart your Mac in Safe Mode: Go to the Apple menu and select Restart. Press and hold the Shift key immediately upon your Mac starting up. Let go of the Shift key when the login window appears. When a follow-up dialog pops up asking if you are sure you want to quit the troublemaking process, select the Force Quit option. Click on the Go menu icon in the Finder again and select Go to Folder. You can as well use the Command-Shift-G keyboard shortcut. Type /Library/LaunchAgents in the folder search dialog and click on the Go button. When an app crashes, you’ll typically see a dialog box that says the software “unexpectedly quit” and you’ll have several options to deal with it, including “Relaunch”. Give that a click and cross your fingers that the crash doesn’t happen again. Oftentimes, you’re good from there. If not Try restarting your Mac.

While investigating the issue and some Googling by my colleague Patrick de Ritter we found that we where not alone. Beside the small note Dan Brinkman already wrote about this issue there is also a nice thread about the issue on the Citrix Discussions forum. To clarify this issue I decided to write an article on how to fix unexpected disconnects with Citrix Receiver for Mac OSX.

The issue the users are experiencing seemed to be caused by a new feature in OSX 10.9 called App Nap. It is a sort hibernation mode for applications and causes the above described effect for users. To prevent this from happening we took the following steps:


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  • Select the check box at Prevent App Nap check box to prevent the application from hibernating.
    Because the Citrix Receiver only handles the connection to StoreFront, you’ll also need to set this for the Citrix Viewer (previously known as the XenApp Viewer).
  • Use Command + I (or right-click the app, then click Get Info) to open the Get Info window.
  • Open the Applications folder and find the Citrix Receiver.
  • To do this, right-click the Citrix Receiver app and select Show Package Contents. Navigate to the Helpers folder, under the Contents folder, and use Command + I (or right-click the app, then click Get Info) to open the Get Info window for Citrix Viewer.
  • Again, select the check box at Prevent App Nap to prevent the application from hibernating. After the user logs on again (because of the services running in the background), the application will never hibernate again for this user. That’s right, these settings are for the logged in user only.
  • Besides changing the settings through the GUI it is also possible to create a script. This script can be started by the user and needs to run in the users context and is case sensitive:

defaults write com.citrix.Receiver.nomas NSAppSleepDisabled –bool TRUE

defaults write com.citrix.XenAppViewer NSAppSleepDisabled –bool TRUE

After the settings have been changed the user won’t experience disconnected sessions, caused by a hibernating application anymore. Remember the user needs to re-login before the changed settings will be effective

Dmg Quit Unexpectedly Mac Fix

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Please note: We tested this against Apple OS X 10.9