Canon EOS users RTM:
Consider a digital asset manager such as Aperture (really too late in its life cycle) or Lightroom. There some other DAMs in the market; however, they do not have an integrated with plugins like Photoshop, Pixelmatr, Perfect Photo Suite, or the Nik Collection.
No. The Canon EOS Utility is a camera-setting, owner ID, and live-tether utility. It is very specific for making changes to Canon cameras and has features that you cannot set from the EOS camera itself. It is not a RAW developer like Adobe's DNG converter, Photoshop RAW, or Lightroom.
I'm assuming also that DPP and the Picture Style Editor apps are also unusable. If you need the utility backgrade to 10.9.x or keep a machine around running 10.6-10.9 so that you can use the utilities when you need to. How many scanner drivers are broken under Yosemite?
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This doesn't answer your question, but some suggestions:
You could use Image Capture (if you have it), or Adobe Bridge (bundled with any adobe software).
Bridge is a browser. You mean DNG Converter. But if you're going to use Lightroom, just import the .CR files directly into LR. -You'll save a step and avoid conversion shenanigans.
Lightroom 4.4 is a steal if you can find it and have good backup-disk hygiene.