Oh,now i see, you were in your home directory while unzipping. That means you now have a useless PsychtoolboxKernelDriver.kext/ directory there.
In the terminal, you must first
into the /Library/Extensions/ subfolder.
Then do the unzip as you did.
Then the kextstat command i showed would tell you if the driver got successfully loaded or not.
That said, your machine has an Intel gfx chip, so Psychtoolbox will not use the driver by default, even if it detects it being loaded, because with Intel gfx, there could be a small chance that it will crash the machine or even damage it. This due to the design of Intel graphics hardware, nothing we could do about it. That said, so far no such case of damage is known to me and i have used the driver quite often with a Intel HD 4000 in a macMini 2012. You’d need to use the setenv(‘PSYCH_ALLOW_DANGEROUS’,‘1’) command in Matlab/Octave before first invocation of Screen to allow it to use the driver. You will see some status output of PTB to that effect if the driver was successfully loaded.
All that said, Apple works hard to make it more painful or borderline impossible to use the driver on “modern” macOS versions. If you read the help PsychtoolboxKernelDriver you’ll find that Catalina may throw more obstacles into your way. I expect the one of the next macOS versions to completely kill off our driver, so i strongly advise against upgrading to Catalina or any later version if avoidable.