switch osx to macos

readme.md

@@ -15,7 +15,7 @@ SDR++ is a cross-platform and open source SDR software with the aim of being blo
 * Multi VFO
 * Wide hardware support (both through SoapySDR and dedicated modules)
 * SIMD accelerated DSP
-* Cross-platform (Windows, Linux, OSX and BSD)
+* Cross-platform (Windows, Linux, MacOS and BSD)
 * Full waterfall update when possible. Makes browsing signals easier and more pleasant
 * Modular design (easily write your own plugins)