I'm using Yosemite and have Lightroom 5 and Photoshop CC 2014 installed ( all up to date ). My workflow was to make most adjustments in LR then select edit in external application (which is set to Photoshop) and had it configured to create and stack a high resolution tiff for final touch ups in PS. This would also give a dialogue box asking whether to edit the original or the LR version with adjustments. This no longer works!. When i try it now it just opens the unedited raw file in PS, no tiff duplicate, no stacking, just the raw file opens with no ajustments, which is useless to me. I have tried setting the secondary application also to PS with the same tiff export settings, but this also doesn't work and again just opens the original RAW file, i don't think i'm the only one with this issue, thanks... Will
Sometimes the problem like this happens when the Camera Raw version in Photoshop is missmatching to the RAW support from Lightroom.
For example: Working with Lightroom 5.6 while Photoshop is on ACR 8.7.
* Currently there is the ACR 8.7 available on the Labs from Adobe.
If this is what you have installed there is a missmatch on the versions.
What happens if you set the Post Processing from Lightroom to Photoshop in the Export Dialog.
Like this you should be able to get the Adjustments you created displayed in the Document that opens in Photoshop
Hope this helps