I'm trying to automate some stuff on my Mac OS Big Sur 11.5.2 . I used to do it on my old computer that was running High Sierra. Now both the packages pyautogui and pynput can run but they never execute the commands that they're supposed to. It's also strange as when I try to pipinstall pynput I get this:

ERROR: Could not find a version that satisfies the requirement
    pyobjc-framework-ApplicationServices>=8.0; sys_platform == "darwin"
    (from pynput) (from versions: 3.1, 3.1.1, 3.2, 3.2.1b1, 3.2.1, 4.0b1, 4.0, 4.0.1, 4.1,
                   4.2, 4.2.1, 4.2.2, 5.0a1, 5.0b1, 5.0, 5.1, 5.1.1, 5.1.2, 5.2, 5.3)
ERROR: No matching distribution found for pyobjc-framework-ApplicationServices>=8.0;
    sys_platform == "darwin" (from pynput)

However when I try to run it using pip3 install it says Requirement already satisfied: pyobjc-core>=8.1 in.

Online it seems to say that I need to downgrade my pyobjc to 7.3, but it's really not clear on how to do that.