事象 : Apacheを起動しようとしたら怒られた

$ apachectl start
(48)Address already in use: AH00072: make_sock: could not bind to address [::]:80
(48)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
AH00015: Unable to open logs

原因 : ポートが他のアプリとかぶっているから

$ lsof -i | grep 80
Google      731 mana  180u  IPv4 0x1dd0702206feb65      0t0  TCP 192.168.0.4:50545->185.199.110.153:https (ESTABLISHED)
Google      731 mana  280u  IPv4 0x1dd07021f59ab65      0t0  TCP 192.168.0.4:50585->104.17.69.176:https (ESTABLISHED)
Dropbox   61354 mana  150u  IPv4 0x1dd07021784d4e5      0t0  TCP 192.168.43.220:63686->162.125.80.3:https (CLOSE_WAIT)
Dropbox   61354 mana  203u  IPv4 0x1dd07020b6521e5      0t0  TCP 192.168.0.4:50211->162.125.80.3:https (CLOSE_WAIT)
Dropbox   61354 mana  205u  IPv4 0x1dd070221fad7e5      0t0  TCP 192.168.0.4:50212->162.125.80.7:https (CLOSE_WAIT)

Apacheで使うポート番号を変える

$ vi /usr/local/etc/httpd/httpd.conf
#<省略>
# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to
# prevent Apache from glomming onto all bound IP addresses.
#
#Listen 12.34.56.78:80
Listen 8080 #<<< 80番から8080に変更した
#<省略>

# エラーは残っているけどポートの被りは解決
$ apachectl start
(13)Permission denied: AH00091: httpd: could not open error log file /usr/local/var/log/httpd/error_log.
AH00015: Unable to open logs

macOS MojaveでApacheを起動しようとしたらPermission denied: AH00091: httpd: could not open error log fileとなったときの対応方法 - Qiita