This is xnu-11215.1.10. See this file in:
xnu-8792.81.2 (MacOS 18, Darwin 22)
xnu-8019 (MacOS 17.0, Darwin 21)
xnu-6153.11.26 (MacOS 15.0, Darwin 19)
xnu-4903.221.2 (MacOS 14.0, Darwin 18)
xnu-4570.41.2 (MacOS 13.3, Darwin 17)
xnu-3789.70.16 (MacOS 12.6, Darwin 16)
xnu-3248.20.55 (MacOS 11.2, Darwin 15)
xnu-2782.40.9 (MacOS 10.10.5, Darwin 14)
xnu-2422.115.4 (MacOS 10.9.5, Darwin 13)
xnu-2050.24.15 (MacOS 10.8.4, Darwin 12)
xnu-1699.32.7 (MacOS 10.7.5, Darwin 11)
xnu-1504.15.3 (MacOS 10.6.8, Darwin 10)
xnu-1228.15.4 (MacOS 10.5.8, Darwin 9)
Directory listing for
xnu-11215.1.10//bsd/man/man4
Makefile
aio.4
arp.4
audit.4
auditpipe.4
bpf.4
dummynet.4
faith.4
fd.4
gif.4
icmp.4
icmp6.4
ifmib.4
inet.4
inet6.4
ip.4
ip6.4
ipl.4
ipsec.4
lo.4
netintro.4
networking.4
null.4
pty.4
random.4
route.4
stderr.4
stdin.4
stdout.4
stf.4
tcp.4
termios.4
tty.4
udp.4
unix.4
urandom.4
vsock.4