Try workaround for JuliaLang/www.julialang.org#2291

This dodges the issue on my machine, let's see if it works for everyone.

(cherry picked from commit dda37f9)

Author: staticfloat

contrib/mac/app/startup.applescript

@@ -1,4 +1,4 @@
 set RootPath to (path to me)
 set JuliaPath to POSIX path of ((RootPath as text) & "Contents:Resources:julia:bin:julia")
 set JuliaFile to POSIX file JuliaPath
-tell application id "com.apple.finder" to open JuliaFile
+do shell script "open -a Terminal '" & JuliaFile & "'"