It seems that new Photoshop version 2015.5.1 has completely different folders structure on Mac. Here is log from 2015.5.1:
[info:core 16:04:28.486 generator.js:227:25] Detected Photoshop version: 17.0.1
[1;31mNo viable plugins were found in '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/S DKs/iPhoneSimulator.sdk/System/Library/Frameworks/QuickLook.framework/pl.lproj/Adobe Photoshop CC 2015.5/Plug-ins/Generator/'
[0m[debug:core 16:04:28.508 generator.js:1804:21] Loading plugin: generator-assets (v2.7.3) from directory: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SD Ks/iPhoneSimulator.sdk/System/Library/Frameworks/QuickLook.framework/pl.lproj/Adobe Photoshop CC 2015.5/Adobe Photoshop CC 2015.5.app/Contents/Required/Plug-Ins/Generator/assets.generate
[debug:core 16:04:28.758 generator.js:1820:21] Plugin loaded: generator-assets
[debug:core 16:04:28.764 generator.js:1804:21] Loading plugin: crema (v3.0.6) from directory: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SD Ks/iPhoneSimulator.sdk/System/Library/Frameworks/QuickLook.framework/pl.lproj/Adobe Photoshop CC 2015.5/Adobe Photoshop CC 2015.5.app/Contents/Required/Plug-Ins/Generator/crema.generate
[debug:core 16:04:29.579 generator.js:1820:21] Plugin loaded: crema
[debug:core 16:04:29.580 generator.js:1804:21] Loading plugin: generator-spaces (v0.4.3) from directory: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SD Ks/iPhoneSimulator.sdk/System/Library/Frameworks/QuickLook.framework/pl.lproj/Adobe Photoshop CC 2015.5/Adobe Photoshop CC 2015.5.app/Contents/Required/Plug-Ins/Generator/spaces.generate
[debug:core 16:04:30.222 generator.js:1820:21] Plugin loaded: generator-spaces
[debug:core 16:04:30.224 generator.js:1804:21] Loading plugin: adobe-preview-generator-plugin (v1.2.0-67bfdfb) from directory: /Library/Application Support/Adobe/Plug-Ins/CC/Generator/preview20155.generate
Before (version 2015.5) all plugins were in /Applications/Adobe Photoshop CC 2015.5/Adobe Photoshop CC 2015.5.app/Contents/Required/Plug-Ins/Generator
Is there any documentation regarding where Photoshop is looking for generator plugins?