Unity game works well with other platform but except IOS devices via Virtualbox build

I have a game that works well in all platforms in android or web build but in iphone 6, i was able to view main menu but when I tap play button, it will crash most of the time. But sometimes i was able to view the next scene for a short period of time then crash.

what could be the reason? I don't know how to debug it since I am only using virtualbox to build Iphone games (I don't have mac pc)

Here is some information:

• I use TK2D (2D Toolkit) plugins I generally use tk 2d tile...

Unity game works well with other platform but except IOS devices via Virtualbox build