Updated documentation

Author: w3stling

README.md

@@ -1,9 +1,9 @@
 # FIX Log Viewer
 [![Download](https://img.shields.io/badge/Download-1.0.0-blue.svg)](https://github.com/apptastic-software/fix-log-viewer/releases/latest) 
 
-FIX Log Viewer allows you to view FIX engine logs in a much more readable format. This helps you find, analyze, and fix issues faster.
+FIX Log Viewer is a cross-platform tool for viewing FIX engine logs in a much more readable format. This helps you find, analyze, and fix issues faster.
 
-Available for Windows, Linux and Mac.
+Available for Windows, Linux and MacOS.
 
 ![FIX Log Viewer draw selection](/assets/screenshot1.png)
 
@@ -47,10 +47,19 @@ Available for Windows, Linux and Mac.
 * Coloring and conditional formatting
 * Resolves currency codes, MIC codes, and LEI codes
 
-## Download
+
+
+## Installation
+
 [![Windows](/assets/windows.png)](https://github.com/apptastic-software/fix-log-viewer/releases/latest) [![Linux](/assets/linux.png)](https://github.com/apptastic-software/fix-log-viewer/releases/latest) [![Mac](/assets/mac.png)](https://github.com/apptastic-software/fix-log-viewer/releases/latest)
 
-Download the [latest release][1] for Windows, Linux and MacOS.
+Download the installer for Windows, Linux and MacOS from [Releases][1].
+
+### Note for MacOS users
+Changes to the security model used in the latest versions of **MacOS 10.14 (Mojave)** and **10.15 (Catalina)** mean that the operating system will show an error message ('"FIX Log Viewer" is damaged and can’t be opened. You should move it to the Bin.') when trying to install the application. To work around this, run the following command in a terminal before installing:
+
+`sudo xattr -rd com.apple.quarantine /Applications/FIX\ Log\ Viewer.app`
+![MacOS warning](/assets/macos-warning.png)
 
 ## Demo
 ![FIX Log Viewer draw selection](/assets/screenshot2.gif)