Moving C1 with both Managed & Referenced Catalog to new computer (iMac 2021)

Hi,

I have one catalog with managed and referenced photo's. When I bring it over to my new iMac 2021, I'm unable to localize the referenced images (maps on external disk are invisible). How to handle this? (explanations in user guide and on forums only deal with 'pure' managed or referenced.
Bringing over my referenced catalogs mainly works, with two minor quirks (so far observed):
- strongly cropped images do not give a full screen preview (even not after setting higher pixel preview)
- the customized profile for my camera is not taken over (I brought over preset settings from library).

What am I doing wrong?

Regards,

Johan