Apple never used membrane keyboards, and it's easy to see why. This design aged very poorly – the keystroke feel isn't great at the best of times since it can be difficult to tell when a key is activated, and cleaning the keyboard can be very difficult.
Is Apple keyboard a mechanical or membrane?
What is a mechanical keyboard? PCMag defines mechanical keyboards as physical keyboards which use “an individual spring and switch for each key”. You could argue that Apple's keyboards are mechanical keyboards, too, but there seems to be a general acceptance that the term is best used to describe third-party devices.
Is Apple Magic keyboard membrane?
These keyboards have an actual rubber dome under each key that is triggered when you depress them. Even scissor-switches or butterfly keyboards, as Apple's MacBook lineup are famous for, rely on rubber domes. But mechanical keyboards are different. Once upon a time, all computer keyboards were mechanical.