Can't quite figure how you used the Mac power adapter to charge a battery....
Not the Mac power adapter, but a recent iPad Pro power adapter, which is USB-C. With the iMac I connected the camera to one of its USB-C ports in the back.
To my eyes, the colors look slightly different from my (former) Z6 orig. Same lenses, and using NX Studio in the same way for converting NEFs. I like these colors better.
Could be a different CFA, the changes brought by Expeed 7 (in which case the colors should be close to the Zf's), or perhaps this is not an Exmor sensor?
Nikon Z6III, Nikkor Z 70-200mm f/2.8 VR S @ 200mm, 1/125 sec, f/5.6, ISO 800 (Meadowlark Botanical Gardens, Vienna, Virginia, July 2024)