It works for OS
Because jit.desktop it is a very slowly framerate solution for copying the screen contents into a Jitter matrix I found another solution who seems to works.
!.You need to download cam twist
2. After you install go to camtwist preferences > video apps and drag max msp app to it
3.Choose from Step1 - Desktop+
and you have different settings. Choose what suits for your project
4.Open jit.qt.grab help. Click getvdevlist and getinplutlist. . Choose camtwist for the both umenu. Click toggle from qmetro and Voila!