Bring running-on-mac.md up to the level of running-on-linux.md (#187)

great, thanks

Author: fghalasz

content/en/software/install-and-run/running-on-mac.md

@@ -1,31 +1,68 @@
----
+---
 title: Install and Run on MacOS
 weight: 30
 type: docs
 aliases:
   - /running/running-on-mac
 ---
+<style>.td-content blockquote { border-left: none; color: inherit; padding-left: 2rem;}</style>
+
+## **Prerequisite: Install XQuartz**
+
+Before installing and running Medley on your Mac, you will need to download and install XQuartz - an open-source X11 Windows server for the Mac.  You can download the latest XQuartz .pkg from  [XQuartz.org](https://xquartz.org) and install it using the MacOS installer.
+
+If you do not have a three-button mouse on your Mac, you will need to set `Emulate three button mouse` in the XQuartz preferences.        
+
+>To do so, start XQuartz (e.g., by double clicking the XQuartz icon within Launchpad). Select XQuartz->Preferences from the menu bar. In the Preferences dialog, select the Input tab and then check the *Emulate three button mouse* option.
+
+## **Install Medley**
+
+Medley releases on MacOS are distributed as a .zip file.  The .zip file contains universal binaries so that the same file can be used for either Intel or Apple Silicon machines.
+
+To install Medley:
+
+1. Download the latest release .zip from the Medley latest releases page [(here)](https://online.interlisp.org/downloads/medley_downloads.html) , under the heading "MacOS ...".
+
+	>You can also download the latest release .zip as well as any prior release .zips from the Medley GitHub site [(here)](https://github.com/Interlisp/medley/releases).  In the Assets for any given release, the MacOS .zip file will be entitled *medley-full-macos-universal...zip*
+
+2.  Drag the downloaded *medley-full-macos-universal...zip* file (which MacOS treats as an unzipped folder) from the Downloads folder into any folder of your choosing.  For the purposes of these instructions, we will call this the *\<install_folder>*.  And the file/folder just dragged into the \<install_foler>, we will call the *\<medley_folder>*.
+    >You may also want to rename the \<medley_folder> from *medley-full-macos-universal...* to something more manageable - e.g., *medley-latest*.
+
+4. In a Terminal window, you will need to remove the quarantine attributes from the executable files by executing the following command:
+`xattr -d com.apple.quarantine <install_folder>/<medley_folder>/maiko/darwin.universal/lde*`
+
+    For example: 
+```
+ssd@Mac-mini ~ % xattr -d com.apple.quarantine ~/il/medley-latest/maiko/darwin.universal/lde*
+```
+
+	
+## **Run Medley**
+
+On MacOS, Medley must be started from a Terminal window.
+
+At the Terminal prompt, you need to execute the  command `<install_folder>/<medley_folder>/medley/medley`.  
+>Note: it is usually easiest to first `cd \<install_folder>/\<medley_folder>/medley` and then just execute `./medley`
 
-## **How to Install**
+For example: 
+```
+ssd@Mac-mini ~ % cd ~/il/medley-latest/medley
+ssd@Mac-mini medley % ./medley -a -e -n
+```
 
-1. Get the Installer
-  Download the MacOS installer from [the latest release page](https://github.com/Interlisp/medley/releases/latest).
+Note that the first time you run it, Medley may take 10-15 seconds to start up as it starts the XQuartz X Windows server (assuming that it is not already running).
+>You can optionally start the XQuartz server manually before starting Medley.  It will take 10-15 seconds to start up and then display an Xterm window in the upper-left corner of the screen.  You can just close this Xterm window.
 
-2. Run Medley
-  Unzip the `medley-full-macos-universal...zip` file on your computer. Run the `medley/run-medley` script in the unzipped folder to start Medley.
+There are many options to the `medley` command.  For a brief overview, run `./medley --help`. For a more complete description, run `./medley --man` or click
+        [here](https://online.interlisp.org/downloads/man_medley.html).
 
+For first-time users: `./medley -a -e -n` is a good starting	point.  This will give you a fully populated Medley system, including the applications built on Medley such as Notecards and Rooms.  It will start with a Interlisp Exec window (instead of the Xerox Common Lisp Exec window).
 
-## install medley from release, build maiko
+#### Notes:
 
-Need XCode
-Need XQuartz installed before you build maiko (includes XClient libraries).
+>By default, `medley` will create a directory in *$HOME/il*.  This will be used by the Medley system as its *LOGINDIR*.  Medley will start up with *LOGINDIR* as its current connected directory. 	It will load the personal init file (if any) from *LOGINDIR*/INIT or *LOGINDIR*/INIT.LCOM.  Finally,  Medley will use *LOGINDIR*/vmem/ to store its virtual memory file(s).  The location of *LOGINDIR* can be changed using the `--logindir` option to `medley`.	
 
-* Requirements
 
-- Intel or M1/M2 Macintosh (or even older)
-- XQuartz Macintosh X server for your OS/mac vintage)
 
 
-## XQuartz settings
 
-emulate 3-button mouse