Update README.md

Co-authored-by: adfoster-r7 <[email protected]>

Author: Adithya2357

README.md

@@ -26,7 +26,9 @@ For questions and suggestions, join the Freenode IRC channel or contact the meta
 ## Installing Metasploit
 
 ### Recommended Installation
-Use the free installer, which includes all dependencies and provides a simple setup process. For a manual setup, consult the [Dev Environment Setup](https://docs.metasploit.com/docs/development/get-started/setting-up-a-metasploit-development-environment.html) guide.
+We recommend installation with the [official Metasploit installers](https://docs.metasploit.com/docs/using-metasploit/getting-started/nightly-installers.html#installing-metasploit-on-linux--macos) on Linux or macOS. Metasploit is also pre-installed with Kali.
+
+For a manual setup, consult the [Dev Environment Setup](https://docs.metasploit.com/docs/development/get-started/setting-up-a-metasploit-development-environment.html) guide.
 
 ## Using Metasploit