Right now I have nothing in General Settings "exiftool executable" box to direct the path to ExifTool.

Interestingly, using v5.9 (thanks Ron) I'm able to get the Meta Fields Table populated and the plugin works fine, with nothing in "exiftool executable".

That said, I'm relieved to see that EM and LR6(CC) do work together. 

I would just like to know...

1. What's wrong in this picture (see below)?  IOW does this have anything to do with why am I not able to execute in LR CC? Since it is the message I get whenever I try to run it. ... and more importantly -
2. If not Rob Cole then who will carry on with ExifMeta?

----

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Logger enabled.

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   10.10.3 (x64)
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Number of CPUs: 8
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Memory size: 17179.869184 MB

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Lightroom 6.0.1

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin name: rc Exif Meta
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin path: /Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/PlugIns/ExifMeta 2.lrplugin
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin version: 5.11
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Toolkit ID: com.robcole.lightroom.ExifMeta
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin enabled: true

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin username: _Anonymous_
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Platform support verified - certified for Windows+Mac
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Switched to pref set Nikon 51-pt Auto-focus backed by /Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/PlugIns/ExifMeta 2.lrplugin/Preferences/Nikon 51-pt Auto-focus.txt
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Elare plugin framework initialized.

2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Found ExifTool built-in with plugin.
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   Plugin synchronous initialization completed.
2015-05-08 11:38:37 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:38:40 com.robcole.lightroom.ExifMeta   INFO   Switched to pref set Nikon 51-pt Auto-focus backed by /Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/PlugIns/ExifMeta 2.lrplugin/Preferences/Nikon 51-pt Auto-focus.txt
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   'Update Photos' started 2015-05-08 11:54:45 in normal mode.
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   *** Advanced debug is enabled - no class restrictions..
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   Logging non-verbosely.
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   
2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   Plugin path: /Applications/Adobe Lightroom/Adobe Lightroom.app/Contents/PlugIns/ExifMeta 2.lrplugin

2015-05-08 11:54:45 com.robcole.lightroom.ExifMeta   INFO   Background process paused.
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   INFO   Updating filmstrip.
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   INFO   Updating if need be...
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   INFO   9 photos to do.
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-12.nef
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #1: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-12.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-12.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-12.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-12.exif-meta.xml"
2015-05-08 11:54:48 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-13.nef
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #2: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-13.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-13.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-13.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-13.exif-meta.xml"
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-10.nef
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #3: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-10.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-10.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-10.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-10.exif-meta.xml"
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-11.nef
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #4: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-11.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-11.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-11.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150643-11.exif-meta.xml"
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-10.nef
2015-05-08 11:54:49 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #5: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-10.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-10.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-10.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-10.exif-meta.xml"
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-11.nef
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #6: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-11.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-11.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-11.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-11.exif-meta.xml"
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-12.nef
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #7: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-12.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-12.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-12.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150654-12.exif-meta.xml"
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-10.nef
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #8: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-10.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-10.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-10.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-10.exif-meta.xml"
2015-05-08 11:54:50 com.robcole.lightroom.ExifMeta   INFO   /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-11.nef
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   ERROR   ****** ERROR #9: Unable to update metadata for /Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-11.nef, error message: [string "Common.lua"]:794: Unable to get formatted exif metadata from file (/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-11.nef), error message: Error executing command: Unexpected exit code (512) returned by command: "\usr\bin" -l -X "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-11.nef" > "/Volumes/sjD SSD 480GB 3/Pawprint Pictures/20150411/20150411-150655-11.exif-meta.xml"
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   There were no catalog update errors.
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   0 photos changed.
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   0 photos unchanged.
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   0 photos already up to date.
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   0 photos missing.
2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   

2015-05-08 11:54:51 com.robcole.lightroom.ExifMeta   INFO   'Update Photos' finished at 2015-05-08 11:54:51 (06 seconds).

Did you have to change anything with configuration or the file location of the plugin?  I'm still having this problem since moving to Lightroom CC(6).

-sd