
Update to the Latest Receiver Version. Upgrade to the latest version of Receiver to verify if this resolves the issue. If you are using SHA2 certificates then the older version of Receiver does not support these certificate. Refer to CTX200114 - Citrix Receiver Support for SHA-2 to view the Receiver versions which supports SHA-2 certificates. Even after we use ' Uninstall Citrix Receiver ' to uninstall the receiver from MAC,there are some of the directories that are left behind. The files are not permanently deleted from the device,it’s just that we do not have access to the files deleted from trash. This has mostly been reported after having run earlier versions of the CitrixReceiver.dmg.Also a direct upgrade of the receiver.
Applicable Products
- Receiver for Mac
Symptoms or Error

Solution
With macOS 10.13 High Sierra, Apple has introduced a new feature, where user approval is required to load any newly-installed third-party kernel extensions (KEXTs). Citrix Receiver 12.7 for Mac requires Citrix kernel extension to be loaded for Generic USB Redirection to function properly.
If users see the “System Extension Blocked” prompt when launching a Citrix Receiver desktop or application, they can go directly to System Preferences > Security & Privacy and Click Allow against Citrix Systems Inc as shown below to allow loading of the Citrix kernel extension:
Users can also go to the Devices tab in Citrix Receiver Preferences and follow the steps as shown below in the screenshot:
In addition, users can also open preferences from the Devices tab on the Desktop toolbar or the USB Devices menu in the main Citrix Viewer menu as shown below:
Citrix Receiver for Mac does not require any explicit approvals to enable USB redirection when installed on previous versions of macOS (10.12, 10.11. and 10.10).
Applicable Products
- Citrix Receiver
Objective
Citrix Receiver For Mac Os X El Capitan 10.11.6
Instructions
2.Type in the following command: 'sudo rm -r' (without quotes) and then drag and drop the receiver on the terminal window.
Note : 'sudo rm -r' is most powerful command which will delete all the files and directories under the present working directory, please make sure you are executing this command under correct required directory
3.Hit Enter on your keyboard.
4.You may be prompted to enter your OS X user password. Type it in and then hit Enter on your keyboard.
5.All the directories & files would be successfully removed.
6.Install the latest receiver and test.