I wrote a program with allegro 5 and OS X 10.7. All things are working properly.
Then I did an update to 10.8. All things are working properly. But with update 10.9 something strange happens. After hitting "Escape" the program needs 3- 8 seconds to finish, to close its main window.

In case I remove the function

al_reserve_samples (5)

then the program exit normally. Ok, thats not the solution
Has anyone else seen this ?. Perhaps it is the new OS X Mavericks memory management ??