If the Promise RAID icon does not appear on the desktop, it may be due to the default Finder settings. Follow these steps to resolve the issue:

1. Verify Finder Settings
- Click on the Finder icon or an unused section of the desktop to bring up the Finder menu in your Mac.
- From the top menu bar, select Finder > Settings.

2. Adjust Finder Settings
- In the Finder Preferences window, click the General tab.
- Ensure the "External disks" box is checked.
- Optionally, check "Hard disks" for additional visibility of connected storage devices.

Once these options are selected, the Promise Pegasus icon should appear on the desktop.

3. Check in Disk Utility and Promise Utility
- If the icon still does not appear:
- Open Disk Utility to verify if the Pegasus is detected.
- Open Promise Utility to check the system status.

4. Contact Support
- If the Pegasus RAID is not visible in Disk Utility or Promise Utility, contact Promise Technical Support for further assistance.

These steps should help ensure the Pegasus is properly detected and visible on your Mac system.