How to set up 1 license in 2 computer

I’ve been working my SU-PRO on my MBP, now I got an IMAC and tried to run SP and got this messages:

"Trouble with your license…This SketchUp Pro license was created on a different computer, and will not work here " .

I would like to said that I did a HD copy from my MBP to IMAC, them my question is do I have to uninstall one or both of them and reinstall in order to use the 2 license on both (of course no simultaneously)

Tks

just enter the licence serial number and authorization code into the new install when online, AFAIK you may have 2 different installations with a single licence

Thank so much, that work