There are a lot of hidden files and folders in macOS, which you can still access if you know the method. Here’s how to see the invisible files.
There’s a lot of additional functionality beyond basic Finder use. Mac users love their machines for their clean, simple design, ease of use, and minimalist UI, but underneath all that elegance is a full-blown powerful UNIX operating system.
UNIX was invented at Bell Labs in 1969 and was originally designed to run on mainframe computers with time-sharing terminals. In 1997 when Steve Jobs returned to Apple, the company decided to transition the Mac to a new modern UNIX-based system based on the NeXTSTEP OS, which was developed at Steve’s other company NeXT.
NeXTStep and Mac_OS_9 were combined to create Mac OS X, which Apple shipped in 2000 – now simply called macOS.
Read more at AppleInsider.com