TrueOS (formerly PC-BSD or PCBSD) is a discontinued[3] Unix-like, server-oriented operating system built upon the most recent releases of FreeBSD-CURRENT.

In June 2018 the developers announced that since TrueOS had become the core OS to provide a basis for other projects, the graphical installer had been removed.

[7] TrueOS provided official binary Nvidia and Intel drivers for hardware acceleration and an optional 3D desktop interface through KWin, and Wine is ready-to-use for running Microsoft Windows software.

[9] The first beta of the PC-BSD consisted of only a GUI installer to get the user up and running with a FreeBSD 6 system with KDE3 pre-configured.

Kris Moore's goal was to make FreeBSD easy for everyone to use on the desktop and has since diverged even more in the direction of usability by including additional GUI administration tools and .pbi application installers.

This convention was aimed to decrease confusion about where binary programs reside, and to remove the possibility of a package breaking if system libraries are upgraded or changed, and to prevent dependency hell.

[48] Starting with version 9.0, PC-BSD added other desktop environments, including GNOME, Xfce, LXDE, and MATE.

[49][50] Starting in September 2016 with the rebranding of PC-BSD, TrueOS became a rolling release distribution based on FreeBSD's current branch.

[4][15] TrueOS's package manager takes a similar approach to installing software to many other Unix-like operating systems.

[55] TrueOS and the TrueOS logo are registered trademarks of iXsystems Inc.[56] The New York City *BSD User Group runs a service named dmesgd,[57] which provides user-submitted dmesg information for different computer hardware (laptops, workstations, single-board computers, embedded systems, virtual machines, etc.)