I presume eventually, you are going to uninstall FH V6 from the Netbook and delete all the FH Projects, etc.
Also, I assume the iMac holds all your latest customisation settings, Project folders, etc, and the Netbook is out of date.
Please explain any differences if those assumptions are incorrect.
An important consideration is, do you have significant customisations of Diagrams, Reports, Queries, Fact Sets, Plugins, Records Window Columns, etc, etc? They must be migrated along with the Projects that must include Media and not just the GEDCOM, which I guess you must have done when migrating from Netbook to iMac.
For a general guide see the FHUG Knowledge Base
Family Historian Copy and Migration Guide.
That guide talks in terms of the
source PC and the
target PC.
Assuming there are no customisation settings worth worrying about on the Netbook, then migrate FH V7 directly from the iMac as
source PC to the Windows
target PC following the guide.