README: OSX -> Mac OS

INSTALL.md

@@ -34,15 +34,15 @@ Fedora / Centos / RHEL
 ----------------------
 Install elfutils-libelf-devel libcurl-devel binutils-devel elfutils-devel
 
-Mac OS X
+Mac OS
 --------
 Install dependencies:
 
 ```sh
 brew install zlib bash cmake pkgconfig dwarfutils openssl
 ```
 
-OSX build instructions (see Issue #166 / Issue #357):
+Mac OS build instructions (see Issue #166 / Issue #357):
 
 Create an empty build dir and do the following steps (adjust openssl path, can also be in /opt):
 

README.md

@@ -6,7 +6,7 @@
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 ## *kcov*
-Kcov is a FreeBSD/Linux/OSX code coverage tester for compiled languages, Python
+Kcov is a FreeBSD/Linux/Mac OS code coverage tester for compiled languages, Python
 and Bash.  Kcov was originally a fork of [Bcov](https://bcov.sourceforge.net/), but has
 since evolved to support a large feature set in addition to that of Bcov.