The current 64bit kernel extension for macOS (2nd Dec 2015) does not load on Sierra, here is what kextutil says:
👉 sudo kextutil /System/Library/Extensions/PsychtoolboxKernelDriver.kext
Notice: /System/Library/Extensions/PsychtoolboxKernelDriver.kext has debug properties set.
Diagnostics for /System/Library/Extensions/PsychtoolboxKernelDriver.kext:
Code Signing Failure: code signature is invalid
Untrusted kexts are not allowed
ERROR: invalid signature for PsychtoolboxKernelDriver, will not load
And codesign:
codesign -v /System/Library/Extensions/PsychtoolboxKernelDriver.kext
/System/Library/Extensions/PsychtoolboxKernelDriver.kext: unsealed contents present in the bundle root
The only file in the root is Info.plist!? I think Mario gets someone else to codesign as one needs a developer account with a modified certificate.
Ian