If you use Photoshop CC on a Mac and it crashes when using GPU-assisted features like Smart Sharpen, you may need to turn off OpenCL support in Photoshop until the problem is fixed. Reports point to a possible bug in the Apple graphics driver for AMD/ATI GPUs in OS X 10.9.2 Mavericks. (Which means this crash may only apply to you if your Mac has that type of GPU in that version of OS X.)

[Update: This did turn out to be an Apple bug. Apple fixed it in OS X 10.9.3. If you are running 10.9.3 or later you do not need to perform the steps listed below; you can leave OpenCL turned on in Photoshop. This also means that if Photoshop is crashing and you are using OS X 10.9.3 or later, the cause is probably not related to this problem.]

The official Adobe help page for this issue walks you through the steps to disable OpenCL support in Photoshop:

Photoshop Help / Crash | Smart Sharpen

Here’s a picture of the option, since the Adobe help page doesn’t include one (click to enlarge):

This bug has also been discussed in posts in the Adobe Community forum for Photoshop (such as Crashes with PS CC on Mac OS 10.9.2), and on the Mac Performance Guide blog (2013 Mac Pro: Photoshop CC Filter Crashes Appear to be Due to Apple Graphics Drivers). The MPG article also refers to OS X 10.9.2 issues with with some external monitors such as the NEC PA series; I’ve also seen these problems.