Allow System Extension for MacOSX Catalina 10.15.4 or later

New MacOSx Catalina 10.15.4 or later does not use kernel extension(com.paloaltonetworks.kext.pangpd), instead will use any of the available utun interfaces provided by macOS as the virtual adapter.

Once the user connects they will see the following prompt, to allow the System Extension. 

• MacOSX 10.15 Catalina
• GlobalProtect Client 5.1.4 or above

• After upgrade to the latest GlobalProtect Client 5.1.4. you will be prompted with a pop "System Extension Blocked".

1. To Allow the System Extension, click "Open Security Preferences"

2. Then click the Lock at the bottom to make changes, it will prompt the user to authenticate

3. Then click allow next to "System software from application "GlobalProtect" was blocked from loading" and close the windows. 
4. If you're managing MacOS via MDM, you can also add the following Team ID (PXPZ95SK77) and Extension (com.paloaltonetworks.GlobalProtect.client.extension) to whitelist, if these are pre-approved on the MDM, user will not see the System Extension Blocked pop-up.