Hello.
XE10 very simple project, with Form1 + TButton and Form2 + TChart (only this one component!)
If I open Form2 from Form1 Button click (Form2,Show or Form2.ShowModal), In WIN all work fine, but under OSX app crashes and closes.
StackOverflow: Firemonkey
Embarcadero: Firemonkey OOP
Embarcadero: Firemonkey C++