OS X unity web player consistentcy issues

This is not as much as a personal issue with building a web player based game rather its a problem with consistency with what runs and does not run within the same browser. Basically its the error of Unity web player failing to launch and the details saying could not initialize content.

Im on OS X 10.10 and i use unity 5.

Im not sure how to word it but in a sense i have unity 5 installed and working i can play some* unity web player games with no problems both in Fire Fox and Safari. But im also running into the issue of unity games failing to start with regularity. I have no clue why this is as well with the most bizzare of circumstance when i even check the unity cache even that tends to fail to start. Is there error logs i can show that im not seeing on mac?

Any help would be appreciated.

Just to add onto this. Is the problem exclusively on my end or is the creator of the game at fault for making a game that has issues on other platforms and they never checked?