A little known fact is that macOS ships with Apache httpd. You can launch it
sudo apachectl start. Configuration files are available in
/etc/apache2 directory and default
DocumentRoot is /Library/WebServer/Documents.
Note however that macOS no longer ships PHP/Ruby/Perl/etc. so you will need to
install a scripting language separately to do any kind of dynamic web
say(1) and TTS in Edit menu
macOS has built-in text-to-speech capabilities. To make your Mac speak out some text, pipe it to the say(1) program:
$ echo "colorless green ideas sleep furiously" | say
You can also pass the text as via CLI arguments:
$ say "hello world"
Running it with
-v "?" prints a list of voices available. Multiple languages
are supported and there are some fun novelty voices. You can choose a
voice by passing voice name through
$ say "hello world" -v Bells
say(1) program can be used as TTS component in your shell scripts, cronjobs or other automations.
For most of macOS GUI programs you can highlight some text on the screen and make it spoken through Edit -> Speech -> Start Speaking.
There’s no tmux in a standard macOS install, but older equivalent of tmux - GNU screen - is shipped with macOS. It will be less convenient, but it still gives you an option to make CLI tools run in the background without keeping an active terminal session. Like tmux, it supports terminal session multiplexing with pseudo-window manager features like splitting the terminal into multiple panes. Read the screen(1) manpage for further information.
Grapher is a simple GUI tool to draw 2D and 3D graphs of mathematical functions. It supports various coordinate systems such as classical, spheral, logarithmic, cylindrical. Both regular and differential equations are supported.
Digital Colour Meter
Digital Colour Meter is a GUI app to measure the exact RGB color values of the pixel under the cursor. This is helpful for GUI or frontend programming tasks that require reproducing the exact colors from the design images. Command-L makes it (un)lock on a point on the screen.
Font Book is a viewer for all the fonts installed on your macOS system that also allows installing optional or custom fonts.
/usr/share/calendar and calendar(1)
Modern macOS is Unix system (officially and ancestrally). Many technical details from BSD systems can be found in macOS. One example is /usr/share/calendar directory that has human and machine readable files listing various notable dates, such as national holidays:
$ ls -lh total 248 -rw-r--r-- 1 root wheel 483B Sep 2 10:35 calendar.all -rw-r--r-- 1 root wheel 1.4K Sep 2 10:35 calendar.australia -rw-r--r-- 1 root wheel 13K Sep 2 10:35 calendar.birthday -rw-r--r-- 1 root wheel 1.0K Sep 2 10:35 calendar.christian -rw-r--r-- 1 root wheel 3.2K Sep 2 10:35 calendar.computer -rw-r--r-- 1 root wheel 269B Sep 2 10:35 calendar.croatian -rw-r--r-- 1 root wheel 1.7K Sep 2 10:35 calendar.dutch -rw-r--r-- 1 root wheel 22K Sep 2 10:35 calendar.freebsd -rw-r--r-- 1 root wheel 265B Sep 2 10:35 calendar.french -rw-r--r-- 1 root wheel 261B Sep 2 10:35 calendar.german -rw-r--r-- 1 root wheel 25K Sep 2 10:35 calendar.history -rw-r--r-- 1 root wheel 21K Sep 2 10:35 calendar.holiday -rw-r--r-- 1 root wheel 280B Sep 2 10:35 calendar.hungarian -rw-r--r-- 1 root wheel 6.5K Sep 2 10:35 calendar.judaic -rw-r--r-- 1 root wheel 1.4K Sep 2 10:35 calendar.lotr -rw-r--r-- 1 root wheel 13K Sep 2 10:35 calendar.music -rw-r--r-- 1 root wheel 674B Sep 2 10:35 calendar.newzealand -rw-r--r-- 1 root wheel 264B Sep 2 10:35 calendar.russian -rw-r--r-- 1 root wheel 843B Sep 2 10:35 calendar.southafrica -rw-r--r-- 1 root wheel 269B Sep 2 10:35 calendar.ukrainian -rw-r--r-- 1 root wheel 1.4K Sep 2 10:35 calendar.usholiday -rw-r--r-- 1 root wheel 469B Sep 2 10:35 calendar.world drwxr-xr-x 3 root wheel 96B Sep 2 10:35 de_AT.ISO_8859-15 drwxr-xr-x 9 root wheel 288B Sep 2 10:35 de_DE.ISO8859-1 drwxr-xr-x 2 root wheel 64B Sep 2 10:35 de_DE.ISO8859-15 drwxr-xr-x 7 root wheel 224B Sep 2 10:35 fr_FR.ISO8859-1 drwxr-xr-x 2 root wheel 64B Sep 2 10:35 fr_FR.ISO8859-15 drwxr-xr-x 4 root wheel 128B Sep 2 10:35 hr_HR.ISO8859-2 drwxr-xr-x 5 root wheel 160B Sep 2 10:35 hu_HU.ISO8859-2 drwxr-xr-x 9 root wheel 288B Sep 2 10:35 ru_RU.KOI8-R drwxr-xr-x 6 root wheel 192B Sep 2 10:35 uk_UA.KOI8-U
For example, calendar.computer lists notable dates from computer history:
$ head -n 20 /usr/share/calendar/calendar.computer /* * Computer * * $FreeBSD: src/usr.bin/calendar/calendars/calendar.computer,v 1.11 2007/09/07 03:23:06 edwin Exp $ */ #ifndef _calendar_computer_ #define _calendar_computer_ 01/01 AT&T officially divests its local Bell companies, 1984 01/01 The Epoch (Time 0 for UNIX systems, Midnight GMT, 1970) 01/03 Apple Computer founded, 1977 01/08 American Telephone and Telegraph loses antitrust case, 1982 01/08 Herman Hollerith patents first data processing computer, 1889 01/08 Justice Dept. drops IBM suit, 1982 01/10 First CDC 1604 delivered to Navy, 1960 01/16 Set uid bit patent issued, to Dennis Ritchie, 1979 01/17 Justice Dept. begins IBM anti-trust suit, 1969 (drops it, January 8, 1982) 01/24 DG Nova introduced, 1969 01/25 First U.S. meeting of ALGOL definition committee, 1958
There is also calendar(1) - a CLI tool to help you remember some notable dates based on the calendar file (the following output is from 2023 November 10):
$ calendar -f /usr/share/calendar/calendar.usholiday Nov 11 Veterans' Day $ calendar -f /usr/share/calendar/calendar.world Nov 10 Greg Lake is born in Bournemouth, England, 1948 Nov 10* Parshas Toldos Nov 10 King's Birthday in Bhutan Nov 10 Henry Stanley asks David Livingston, "Dr. Livingston, I presume?", 1871 Nov 10 Cpt. Wirz, commandant of Andersonville Prison hanged, 1865 Nov 10 41 Women arrested in suffragette demonstrations near White House, 1917 Nov 10 Soviet President Leonid Brezhnev dies at age 75, 1982 Nov 10 Martin Luther born in Eisleben, Germany, 1483 Nov 11* Rosh Chodesh Kislev (Beginning of the month of Kislev) Nov 11 Republic Day in Maldives Nov 11 Remembrance Day in Canada Nov 11 Independence of Cartagena in Colombia Nov 11 Independence Day in Angola Nov 11 Angola gains independence from Portugal, 1975 Nov 11 Washington becomes the 42nd state, 1889 Nov 11 Kurt Vonnegut, Jr, born in Indianapolis, 1922 Nov 12 Neil Young is born in Toronto, 1945 Nov 12 USA first exports oil to Europe, 1861 Nov 12 Dr. Sun Yat-sen's Birthday in Taiwan Nov 13 Paul Simon born, 1942 Nov 13 St. Augustine of Hippo born in Numidia, Algeria, 354 Nov 13 Robert Louis Stevenson born, 1850
pbcopy(1) and pbpaste(1)
These two tools integrate macOS pasteboard into terminal workflows. Piping
pbcopy copies it and running
pbpaste outputs text from pasteboard
into standard output:
$ echo "crypto stands for cryptography" | pbcopy $ pbpaste crypto stands for cryptography
networkQuality is CLI tool to measure UL/DL bandwidth and latency of your