§ Troubleshooting
License activation failed
Three common causes: network reach to the licensing server, the wrong key (typo, leading whitespace), or hitting the three-device cap. The failure-class row in Settings › License + Updates names the cause.
Who this is for
New users whose Save + Validate returned an error, and existing users whose Refresh Auth Token started failing.
Fix path
- 01
Re-copy the key
Open the purchase email, triple-click the key, copy clean. Watch for leading or trailing whitespace.
- 02
Save + Validate again
Click Save + Validate. If it succeeds, the device counts active.
- 03
Read the failure class
On failure, Settings shows a failure class / code / time. Common classes: NetworkUnreachable, KeyInvalid, DeviceLimitReached, ServerError.
- 04
For DeviceLimitReached
Revoke a device. Settings › License + Updates → Devices → Revoke on the old Mac. Or use dettivo.com/help/devices.
- 05
For NetworkUnreachable
Check your internet, retry. Activation only needs a single successful round-trip; offline use is fine after that.
Launching April 2026
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Dettivo opens for new purchases in April 2026. One-time license, three Macs, lifetime updates.