Yes, just install it on the iMac
Maybe I'm missing something, but I looked up installing it, and I'm constantly brought to Creative Cloud. When I purchased light room 5, it was separate. Light room used to be in the apple store, but things have changed and now I'm not sure where to go
You had to install the program from a CD or downloaded installer file on the old computer. That is what you use to install on the iMac.