Red Tint on Photos

Very likely it's related to RAW (search for Canon RAW pink hue / tint on internet).

I see that you use macOS Mojave. These are the digital camera RAW formats supported by it: https://support.apple.com/en-us/HT208967

If RAW files are having a color tint, and the RAW format of the camera is supposed to be supported, it sometimes helps to register the RAW support again using the Terminal.

The fix has been posted many years ago by Alan Roseman. Re: Aperture 3 preview of raw file greenish

😝 There is a "typo" in the command given in the link above, so read also the following posts on how to correctly enter the command and how the fix is supposed to work 🙂

I got this from another area, and unfortunately can not attribute the origin here on the support forums.

Open the terminal, paste this text in and hit return. This repaired the issue in both my MacBook Pro and my Mac Pro.

Thanks to the original poster!

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -R /System/Library/CoreServices/CoreTypes.bundle/Contents/Library

The command is supposed to work like this:

The lsregister command registers the document types with the lauch service database, and the

"-R" option forces the recursive registration of the contained bundles, if you register a bundle. The "CoreTypes.bundle" contains the following bundles:

MachineTypes.bundle

iLifeMediaBrowserTypes.bundle

MobileDevices.bundle

iLifeSlideshowTypes.bundle 

RawCameraTypes.bundle

including the RawCameraTypes.bundle; so the above command will register the known raw file types supported by the OS, e.g. Canon CRW raw image.

If you want to find out, which formats are actually registered, run the "lsregister" command with the "-dump" option; this will give you a very long list of registered file types:

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -dump

To check if your own raw format is registered you may want to filter this list using grep, e.g.

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -dump | grep "Canon CR2 raw image"

will filter for the output lines containing "Canon CR2 raw image" and show that the Canon CR2 raw image format is registered:

description: Canon CR2 raw image

description: Canon CR2 raw image

In all cases, where you find that your raw file type is not yet registered, Alan Roseman's fix will be very helpful, in the other cases it will make no difference.