Hi there! I´ve just installed UnrealEngine 4 on my iMac (pretty old, 2009 I guess, with El Capitan). But when I launch the Program from the Epic Games Launcher, there just pops up a white window without any Letters, just some grey boxes where the letters should be:
How can this be fixed? I´ve tried already this:
but this didn´t work at all 
. Thanks for your help! And sorry for my bad english 