I was about to say update to the current ColorNavigator 6. But apparently the Spyder2 is no longer supported, so you can't without buying a new sensor.
Could it be the Photoshop bug I mentioned? Have you tried disabling the GPU in Photoshop (or setting it to Basic mode)? Do you see the same in Adobe RGB/sRGB?
Or when you say "The blacks have more detail (...) in Photoshop" - maybe Photoshop is right and Lightroom is wrong? Are the blacks actually clipped in Lightroom? There was a long thread in the Adobe Lightroom forum about Lightroom clipping blacks in OS X while Photoshop was unaffected - but IIRC that was under Mavericks.
“Have you tried disabling the GPU in Photoshop (or setting it to Basic mode)? “
• Yes. Same issue no matter how I set the Graphics Processor Settings.
“Do you see the same in Adobe RGB/sRGB?”
• Yes. I exported from lightroom to a Tiff with Adobe RGB. Opened the file in PS and Appl’es Preview. Same issue.
• Also opened an edit from lightroom to PS with ProPhoto RGB. The Prophoto RGB and Adobe RGB in PS looked the same.
“Or when you say "The blacks have more detail (...) in Photoshop" - maybe Photoshop is right and Lightroom is wrong? “
I don’t know:
• If I open an sRGB JPEG file directly into each program (i.e. not export or edit in PS) – They do not match.
• Same problem if I export to JPEG from lightroom and then open the file in PS
• If I save the photo in PS, and then view it in LR, it matches the original LR version.
• Apple’s Preview matches Lightroom
• Photos in Firefox match Lightroom
“Are the blacks actually clipped in Lightroom? “
• Not according to Lightroom’s histogram. If there is black clipping it’s a little spot maybe 5% of the pic. So I would say that is not it.