THIS! Driving me nuts.
This has been driving me batty since Yosemite was released and it's definitely a problem:
CPU: 2009 iMac Corei7 with 24 gigs of ram, internal 1 TB drive, external 5 TB array via FW800, 3 different 1.5 TB USB drives. Running Yosemite 10.10.
I take shots on a Nikon D3200 using the v1.03 firmware and write to multiple Class 10 SD cards. One is 64 gig, one is 32 gig and I have another 32 gig.
If I take a JPEG, the problem doesn't exist. If I load shots from my iPhone the jpegs load fine.
If I load a SD card full of .NEFs it literally causes iPhoto to sieze nearly to a halt and parts of the user interface get scrambled by doing so.
If I look at the thumbnails they are either black or half the screen is the image and the other half is black.
If I look at the images itself they are either fully black or cause the user interface to almost hang while reading.
I literally went so far as to back up my 300 gig iPhoto library and start a completely new iPhoto library. I delete iPhoto off my computer altogether, redownloaded and started completely from scratch.
No joy, same crap. 240 JPEGs off my iPhone? No problem. Thumbnails and photos look great. 3 .NEFs from a 64 gig SD card: images are black, thumbnails are black. At least the UI isn't hanging like it did before.
Here's the funny thing: I can take the same SD card and load it on my work Windows PC and the pictures load, store and view fine.
This is a Mac problem. But not everyone is having the issue: my friend with a Nikon D5300 his .NEFs are coming out fine but he's got a brand new Mac Pro so I'd expect that to work.
For once, the Mac is the weak sister and the PC "just works".
I can't download a version of the Digital Camera Raw Compatibility Update because the newest one I can download is 5.07 and if I try to install that it claims the one I'm running now is NEWER than that one!
The worst part was the photography section on this board - everyone there had no clue what I was talking about - it's so obvious this is broken.
If I was a commercial photographer I'd have to either dump Mac or go back to Mavericks somehow because this just isn't workable. Ideas?
I even tried to leave iPhoto out of the mess by just reading the .NEFs in the finder but it's obviously a system problem because the files have the same issue in preview.