mh i don't have issues with launching BitShares PTS and BitSharesX clients in parallel! Or did i get something wrong?
I just tried it again on a different machine (10.9.4) and you're right, both PTS nightly builds and X launch just fine. Sorry! On Yosemite 10.10, PTS doesn't launch due to unfound library libdb_cxx-4.8.dylib, and BitSharesX displays the error as depicted above. I'm not sure yet why this is happening. This is the first time I'm experiencing issues with wallets on Yosemite, i.e. all other wallets which work on 10.9.x work fine on 10.10.x as well. I'll dive into this to see what's the culprit.
edit, seems like the app's exectuable file (MacOS/BitSharesX) does not run on 10.10 for some reason, "“BitSharesX” is damaged and can’t be opened. You should move it to the Trash.