Using your operating system, connect the iMac and the 1TB hard drive, and then copy the photos to the 1TB drive.
Using your operating system, copy the catalog file to the macbook and connect the 1TB hard drive.
In Lightroom on the macbook, reconnect the photos using these instructions: Adobe Lightroom - Find moved or missing files and folders (see figure 4 and the following text)
Moving from one Mac to another often involves an external drive.
You should rearrange things in your current LR so that you have as few top-level folders as possible—preferably one or only a handful.
And once you’re copying all your photos from the old mac to the external drive to the new mac, using operating system functions (not LR), make sure you keep the same relative folder structure. That way when you open your LR catalog on the new computer you can use Locate Missing Folder on the top-level folders to re-connect all the folders on the new mac with the internal LR folder structure.
Here is a webpage that talks about moving from one computer to another:
Thanks, I did as you suggested and it worked fine. I was doing almost the same thing but I missed a step - again, thanks ,mj.