Well, I went and got a nice new 27" iMac with 5K, Mac OS X Sierra and have been trying to trouble shoot this issue with getting Paragon Chat to start.
The Island Rum window opens, it scans the files. I get the play button. I click the play button, and get a green checkmark, and then the COH app icon pops up in the dock and bounces for a second or two, and then nothing.
I read in another thread, that if I saw a blue outline of a window when I choose Show All Windows when right clicking on the icon, that it's something with xquartz.
So I reinstalled it with brew, and same issue.
Here is the error coming up in the log from ~/Library/Logs/Unity/Player.log:
QGraphicsItem::grabMouse: already a mouse grabber
2017-06-04 00:14:08.501 cider[13718:820308] TransformProcessType failed! Err: -50
2017-06-04 00:14:16.619 cider[13718:820308] [CHTTPComm::sendReport] : SendRequestWithTimeout failed
Could not stat /Applications/COH.app/Contents/Resources/transgaming/f_drive (No such file or directory), ignoring drive F:
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-core-synch-l1-2-0.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-core-synch-l1-2-0.dylib, 2): image not found
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-core-fibers-l1-1-1.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-core-fibers-l1-1-1.dylib, 2): image not found
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-core-synch-l1-2-0.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-core-synch-l1-2-0.dylib, 2): image not found
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-core-fibers-l1-1-1.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-core-fibers-l1-1-1.dylib, 2): image not found
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-core-localization-l1-2-1.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-core-localization-l1-2-1.dylib, 2): image not found
err:heap:NewRtlFreeHeap block 0x402400 isn't a valid part of heap 0x7032b100
err:module:BUILTIN32_dlopen failed to load .so lib for builtin api-ms-win-appmodel-runtime-l1-1-1.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libapi-ms-win-appmodel-runtime-l1-1-1.dylib, 2): image not found
err:module:BUILTIN32_dlopen failed to load .so lib for builtin ext-ms-win-kernel32-package-current-l1-1-0.dll: dlopen(/Applications/COH.app/Contents/Frameworks/libext-ms-win-kernel32-package-current-l1-1-0.dylib, 2): image not found
err:heap:NewRtlFreeHeap block 0x402400 isn't a valid part of heap 0x7032b100
So it's definitely not seeing something. Not sure what to do now. I should also add, that Icon seems to work fine launching.