MEN_CreateIssueOnGithub: Workaround issue on MacOSX

Somehow the operation BrowseURL does not work on MacOSX catalina of the
author.

This could be some security feature issue, so let's just inform the user
what to do.

Packages/MIES/MIES_Menu.ipf

@@ -209,7 +209,16 @@ Function MEN_CreateIssueOnGithub()
 
 	sprintf url, "https://github.com/AllenInstitute/MIES/issues/new?title=%s&body=%s", URLEncode(title), URLEncode(body)
 
+#if defined(WINDOWS)
 	BrowseURL(url)
+#elif defined(MACINTOSH)
+	printf "##############################\r"
+	print body
+	printf "##############################\r"
+	printf "Please paste the text between the hashtags into a new issue at: https://github.com/AllenInstitute/MIES/issues/new\r"
+#else
+	ASSSERT(0, "Unsupported OS")
+#endif
 End
 
 Function MEN_ClearPackageSettings()