If you encounter these Thunderbolt error messages when connecting a Thunderbolt 3 device like the Pegasus3 or Pegasus32 to your Mac or Windows PC, the issue is often related to the cable being used.
Common Error Messages
- Mac:
"Cannot use Thunderbolt Accessory. Connect accessory to a Thunderbolt port on this Mac. All of the ports on this Mac are Thunderbolt ports."
- Windows:
"Thunderbolt device functionality might be limited. Make sure the Thunderbolt device you’re connecting to is supported by your PC."
Cause of These Errors
These messages usually indicate that the cable used is not a Thunderbolt 3 cable but rather a USB-C charging or data cable. While USB-C cables can physically fit into Thunderbolt 3 ports, they do not support Thunderbolt data transfer. The system detects a connection but cannot establish proper communication with the Pegasus device.
How to Identify a Thunderbolt 3 Cable
- Look for the Thunderbolt Logo:
- A genuine Thunderbolt 3 cable will have a small lightning bolt symbol on it.
- USB-C only cables do NOT have this marking.
- Check the Original Cable:
- Use the Thunderbolt 3 cable that came with your Pegasus3 or Pegasus32 device.
- Verify Cable Type:
- If unsure, test with a known working Thunderbolt 3 cable or purchase a new one.
Solution
If you receive either of these error messages:
- Ensure you are using a certified Thunderbolt 3 cable.
- Avoid using generic USB-C cables, as they might only support charging or limited data transfer.
- If needed, purchase a new Thunderbolt 3 cable from a reputable source.
