I just ordered my new 5k iMac. Is there a support doc that describes the process of moving LR and PS CC from my old iMac to the new?
Use the below link for moving Lightroom to mew machine.
For Photoshop, you need just install it on the new machine, if you have created any presets like brushes, actions and Workspace
then you need to copy the Photoshop Preferences to new machine on the same location.
Location: Users/[user name]/Library/Preferences/Adobe Photoshop CC 2015 Settings.
Let us know if that helps.