If you want to try BSD, GhostBSD might be your best bet
BSD, or Berkeley Software Distribution (aka Berkeley Standard Distribution) is a discontinued operating system that was based on Research Unix. Originally called Berkeley UNIX, BSD was first developed in the late 70s and then, in the early 80s, it was adopted by some workstation vendors as an alternative to DEC Ultrix and Sun Microsystem's SunOS.
Eventually, BSD faded away but the code remained behind. In the early 90s, William and Lynne Jolitz developed a new port of BSD for Intel CPUs, calling their operating system 386BSD. Development for 386BSD slowed and eventually stalled. It was then that a small group of 386BSD users decided to keep the OS up to date, renaming the project FreeBSD and releasing the first iteration on November 1993.