個人積分：31793分
文章編號：86137668
個人積分：4143分
文章編號：86139618
鈔能力 wrote:
賈伯斯真的很行，把這麼難用的系統，搞到大家都假裝沒看見
不會難用吧？算是很穩定的系統。與股價無關就是了。
FreeBSD is Just macOS Without the Good Bits
This is as much a myth about macOS as about FreeBSD; that macOS is just FreeBSD with a pretty GUI. The two operating systems do share a lot of code, for example most userland utilities and the C library on macOS are derived from FreeBSD versions. Some of this code flow works in the other direction, for example FreeBSD 9.1 and later include a C++ stack and compiler that were originally developed for macOS, with major parts of the work done by Apple employees. Other parts are very different.
Darwin - which consists of the XNU kernel, IOkit (a driver model), and POSIX compatibility via a BSD compatibility layer - makes up part of macOS (as well as iOS, tvOS, and others) includes a few subsystems (such as the VFS, process model, and network implementation) from (older versions of) FreeBSD, but is mostly an independent implementation. The similarities in the userland, however, make it much easier to port macOS code to FreeBSD than any other system - partially because a lot of command-line utilities were imported along with the BSD bits from FreeBSD. For example, both libdispatch (Grand Central Dispatch in Apple's marketing) and libc++ were written for macOS and worked on FreeBSD before any other OS.
以上摘錄自 FreeBSD Myths
