Hi @paulg26144953:
The InDesign custom workspaces are stored here:
<user name>/Library/Preferences/Adobe InDesign/[Version#]/[Language]/Workspaces
I routinely copy them from one version to another, and suspect that moving them from one computer to another would work equally well. Keep in mind that the Library folder is hidden by default. Hold the Alt key as you open the Go menu in Finder and your Mac will put it in the list.
Photoshop: [user name]/Library/Preferences/Adobe Photoshop [version#] Settings/Workspaces
Illustrator: [username]/Library/Preferences/Adobe Illustrator [version#] Settings/[Language]/Workspaces
~Barb