Corrupt CR3 Images

I don't your camera, but afaik the support for CR3 has only been added recently with the most recent RAW update: Digital camera RAW formats supported by iOS 12 and macOS Mojave - Apple Support

Are you using iCloud Photos and are you perhaps syncing your photos library to devices with older system versions?

This appears to be a memory issue. My current iMac with 16GB memory handles the files better that the iMac 27" i9 with 8GB memory but photos go black when unused memory drops to 3GB or less.

I used Memory Clean after importing photos and they were fine. The remaining memory dropped after viewing & editing each individual photo so running Memory Clean and closing down Photos periodically acts as a fix of sorts. For some reason the CR3 files are zapping far more memory than CR2 files.

Please post back if anyone has success using this method.

It should be working on 10.14.2. Is there a reason why you do not update to MacOS 10.14.3? It contains important security fixes.

I asked about the iCloud syncing, because there have been problems with the CR3 files on an iPad, but if you are working with the images only locally on your Mac that should not matter.

You are not by any chance running out of storage on your Mac?

Is your Photos Library on your system drive or on an external drive?

You may want to test, if your Photos Library needs repairing. Test with a new Photos Library in your Pictures folder and import a few photos for testing. Are you seeing the same problem in a new library?

I found that CR3 files turn black when I have iCloud Photo Library enabled and CR3 files being uploaded. This turns uploaded CR3 files to black.

Are you fully updated? Someone here posted that the last Mojave update fixed it.

Same here with a Canon EOS R.

I have a fix that works most of the time but it's labourious. Open black photo - hover over Edit - when message comes up 'Edit Photo' click edit - wait until the wheel at the bottom right corner of the photo has stopped spinning - if the image appears click Crop - Flip or go ahead and crop photo - Done, your photo may or may not show. Even if it does it could turn black again but should re-appear when clicking on Edit.

Very long-winded and an absolute pain. My 2019 27" iMac i9 has been returned for a refund for this and other faults. Come on Apple! I have a wildlife trip coming up and I'll have 2000+ shots to edit. Could take me the rest of my life.

I have overcome this issue, of sorts though the Photos app is now crashing for fun; 17 times at last count.

I've recently uploaded 6000+ RAW images from my Canon EOS R from a trip to Bulgaria and if I ensure there is at least 5 GB of memory when I'm editing no photos turn black. I regularly clean memory and quit the app after uploading which seems to help.

Frustrating and it doesn't bring back the photos I've lost, or the 2019 iMac I sent back, nor will I consider a replacement until this is fixed for good.

At the very least send feedback to Apple and inform them of the problem.

Why not use DPP?

They show up as black on iCloud Photo Library as well, sadly it’s not just a Mac based rendering bug

Send feedback to Apple.

I have the same issue, Canon M50, 10.14.4, all photos appear black. I also thought that it may be something to do with iCloud Photo Library sync, as they appear fine when initially imported, however I tested in another operating system with iCloud disabled and the same thing happened.

Don't bother ever shooting jpegs, so I have an entire month long holiday worth of photos that I haven't been able to import.

I hope so. I still have a 5 week trip’s worth of photos I haven’t been able to edit. I love the iCloud Photo Library integration of the photos app, but I’m considering moving over to Lightroom and just using Desktop and Documents sync to facilitate the cloud backup.

There’s loads of reasons - chiefly, dpp is purely a review and editing app, it doesn’t have any organisation features, and I already have Photoshop if I need to do anything more fancy. Plus the non-destructive editing alongside iCloud integration offered by Photos.app are difficult to walk away from.