John_Hoffman

Maybe help here? Backup disks you can use with Time Machine - Apple Support

If you have a Mac computer ShutterCount by Dire Studios is reliable.

Those printers use the Unifying receiver, not the Bolt receiver that the MX Keys Mini uses.

The  24-105 is known to have a problem with the ribbon cable inside the lens which affects immunization with the camera. As Scott says, all properly functioning EF lenses are compatible.

Maybe Monterey configures itself for the computer it is installed on? My 2018 MacBook Air with Monterey 12.3.1 F4 is Launchpad and F3 is Mission Control (just like the keycaps).

You are correct. I mis-assumed you were using the Auto option in ICC Matching. I don't see any reason that the results should not be the same.

ICC Profile Matching in the printer driver selects the appropriate Canon ICC profile for the media type that has been selected. I.e. it matches the Canon ICC profile to the selected Canon media ...

If it is on a Mac computer system you would go into the System Preferences->Printers & Scanners, select the "+" icon to add a printer and wait for the non-AirPrint version to appear. This works ...

The in-camera lens profile options.

Are you using any in-camera lens corrections? That will sometimes switch off focus point viewing.

PP&L not compatible with Pro-100. Only Print Studio Pro which is plugin only.

uscamera.com Canon C26-1222 Parts Catalog EF 100 2.8 L Macro USM | USCamera PartsUSCamera

Is this a weather sealed lens? Does it have a gasket at the lens mount?

You could have a custom profile created for you. You can Google "custom printer ICC profiles" and find many vendors who could do that for you.

What was the maximum f/stop of your lens? With a 2x TC AF will only work with a lens with max aperture of f/4 or larger.

The best iPhone camera apps | Engadget

There is something wrong with your actual files. I imported them into Lightroom and I get the error that there is no preview available for the files and when I select Import the error says cannot ...

DPP4 manual: Are you opening and saving the RAW images with any other software before you try DPP?

See this YouTube video. Windows method around timecode 10 miniutes. In-depth Lightroom Classic workflow for the DeNoise AI RAW model - YouTube

What about trying Canon EOS Utility? Not free, but you could see if Kuuvik Capture would work