I just bought a new Macbook pro. I then use Apple's Migration Assistant to copy all applications from the old macbook over to the new macbook.
Other applications worked fine but Lightroom. I was not able to open the Lightroom application from the new macbook.
Please click on the below link to download and install Lightroom 6 on your computer.
Please refer the link below to move Lightroom catalog and images from one computer to another.
Let me know if this helps.