Added a link to the latest release for Yosemite

README.md

@@ -24,6 +24,10 @@ This utility will not harm your Mac because it is based on an official command l
 
 *KeepingYouAwake* is inspired by *[Caffeine](http://lightheadsw.com/caffeine/)* from *Lighthead Software*. I used it for many years, but sadly it hasn't been updated in a while. Eventually in 2014 I decided to build a replacement for myself that was optimized for macOS Yosemite and used the [`caffeinate`](https://web.archive.org/web/20140604153141/https://developer.apple.com/library/mac/documentation/Darwin/Reference/ManPages/man8/caffeinate.8.html) command line tool under the hood.
 
+## Still using macOS Yosemite?
+
+[Version 1.5.2](https://github.com/newmarcel/KeepingYouAwake/releases/tag/1.5.2) is the latest release that supports macOS Yosemite and El Capitan.
+
 ## Help Wanted!
 
 Do you want to improve the app or add useful features? Please go ahead and create pull requests. I'm thankful for any help.