If TonePilot used to connect to your Spark amp successfully but now never gets past the connection screen, the problem is usually another device still holding the Bluetooth session.
Most Common Cause
Another device still has the Spark app open or recently connected to the amp. Force-close the Spark app on that device, or turn Bluetooth off there, before trying again with TonePilot.
Step 1
Close the Spark app on other devices first
The most common cause of failed connections is another device still holding the amp over Bluetooth. If you previously used the Spark app from your phone or tablet, force-close the Spark app on that device or turn Bluetooth off there before opening TonePilot.
Step 2
Restart the amp after disconnecting other devices
After closing the Spark app or disabling Bluetooth on the other device, restart your amp. TonePilot should then be able to establish a fresh connection properly.
Step 3
Check for another computer connected through TonePilot
If you previously connected to the amp from another Mac, make sure that machine is not still awake or holding the Bluetooth session. A sleeping computer can still block a new connection.
Step 4
Make sure only one TonePilot window is running
If multiple instances of TonePilot are open, only one can connect to the amp. Quit any extra instance and try again.
Still stuck?
If you have already closed the Spark app everywhere, restarted the amp, and confirmed only one copy of TonePilot is running, contact contact@tonepilot.app and include your amp model plus the macOS version you are using.