Check out this Apple’s original Macintosh computer made out of Lego, There are numerous versions of the computer floating around online featuring both accurate hardware internals and comprehensive instructions is probably the best of them.
This one is made by Jannis Hermanns and he has taken things a step further with a functional classic Macintosh built out of Lego, a Raspberry Pi Zero, and an e‑paper display. While it doesn’t quite run macOS, the little Lego computer does run software called Docker, which can do things like work as a clock or display images on the e-paper screen. And by using a service called resin.io, Hermanns is able to remotely update the software over Wi-Fi.
Hermanns has detailed the entire build process — which included designing the Lego case, wiring up the display, and solving all usual deadfalls and problems that come up in a build like this.