Your acquire suite has failed. ADM is not supported on the mac in 64 bit mode. Here is the section from the FAQ for the SDK.
7 Adobe Dialog Manager (ADM)
7.1 Where are the ADM (Adobe Dialog Manager) header files?
The ADM header files are no longer part of the Photoshop SDK. The Adobe Dialog Manager has been deprecated and no longer works on the Macintosh platform.
7.2 What should I do as a replacement?
There is currently no direct replacement for the ADM API. Plug-in developers must write their UI using the API's provided by the OS. There are 3rd party UI toolkits available. Many developers have had success with the Qt UI framework.
7.3 Which versions of Photoshop will ADM still work with?
Photoshop CS6 on Windows (32 and 64 bit)
Photoshop CS5 on Windows (32 and 64 bit) - Macintosh 32 bit only
Photochop CS4 and previous versions back to Photoshop Version 5.0
int _ErrorMessage(char *astring, char *bstring)
(void)MessageBox((HWND)NULL, (LPSTR)bstring, (LPSTR)astring,
MB_OK | MB_ICONHAND | MB_ICONEXCLAMATION);
int _ErrorMessage(const char *title, char *message)
CFStringRef bstring = CFStringCreateWithCString( NULL, message, strlen(message) );
CFStringRef astring = CFStringCreateWithCString( NULL, title, strlen(title) );
NULL, NULL, NULL,
CFSTR("OK"), NULL, NULL, &nRet); //name on the button