You received a "Registration Code" or "Redeem Code". You must visit the u-he Redeem page and enter this code along with your name and email to receive your final serial number via email.
Right-click the Diva logo and ensure "Multicore" is turned on. u-he diva serial number mac
If you are looking for a u-he Diva serial number for Mac, the solution is simpler than you think: use the official authorization wizard built directly into the plugin interface. There is no need to hunt for serials or manual key entry. You received a "Registration Code" or "Redeem Code"