Fix OS X naming

README.md

@@ -35,7 +35,7 @@ but it has since moved to GitHub, where people more talented than the original a
 Scope:
 
 - This guide is both for beginners and the experienced. The goals are *breadth* (everything important), *specificity* (give concrete examples of the most common case), and *brevity* (avoid things that aren't essential or digressions you can easily look up elsewhere). Every tip is essential in some situation or significantly saves time over alternatives.
-- This is written for Linux, with the exception of the "[OS X only](#os-x-only)" section. Many of the other items apply or can be installed on other Unices or MacOS (or even Cygwin).
+- This is written for Linux, with the exception of the "[OS X only](#os-x-only)" section. Many of the other items apply or can be installed on other Unices or OS X (or even Cygwin).
 - The focus is on interactive Bash, though many tips apply to other shells and to general Bash scripting.
 - It includes both "standard" Unix commands as well as ones that require special package installs -- so long as they are important enough to merit inclusion.
 
@@ -488,27 +488,27 @@ A few examples of piecing together commands:
 
 ## OS X only
 
-These are items relevant *only* on MacOS.
+These are items relevant *only* on OS X.
 
-- Package management with `brew` (Homebrew) and/or `port` (MacPorts). These can be used to install on MacOS many of the above commands.
+- Package management with `brew` (Homebrew) and/or `port` (MacPorts). These can be used to install on OS X many of the above commands.
 
 - Copy output of any command to a desktop app with `pbcopy` and paste input from one with `pbpaste`.
 
-- To enable the Option key in Mac OS Terminal as an alt key (such as used in the commands above like **alt-b**, **alt-f**, etc.), open Preferences -> Profiles -> Keyboard and select "Use Option as Meta key".
+- To enable the Option key in OS X Terminal as an alt key (such as used in the commands above like **alt-b**, **alt-f**, etc.), open Preferences -> Profiles -> Keyboard and select "Use Option as Meta key".
 
 - To open a file with a desktop app, use `open` or `open -a /Applications/Whatever.app`.
 
 - Spotlight: Search files with `mdfind` and list metadata (such as photo EXIF info) with `mdls`.
 
-- Be aware MacOS is based on BSD Unix, and many commands (for example `ps`, `ls`, `tail`, `awk`, `sed`) have many subtle variations from Linux, which is largely influenced by System V-style Unix and GNU tools. You can often tell the difference by noting a man page has the heading "BSD General Commands Manual." In some cases GNU versions can be installed, too (such as `gawk` and `gsed` for GNU awk and sed). If writing cross-platform Bash scripts, avoid such commands (for example, consider Python or `perl`) or test carefully.
+- Be aware OS X is based on BSD Unix, and many commands (for example `ps`, `ls`, `tail`, `awk`, `sed`) have many subtle variations from Linux, which is largely influenced by System V-style Unix and GNU tools. You can often tell the difference by noting a man page has the heading "BSD General Commands Manual." In some cases GNU versions can be installed, too (such as `gawk` and `gsed` for GNU awk and sed). If writing cross-platform Bash scripts, avoid such commands (for example, consider Python or `perl`) or test carefully.
 
-- To get MacOS release information, use `sw_vers`.
+- To get OS X release information, use `sw_vers`.
 
 
 ## More resources
 
 - [awesome-shell](https://github.com/alebcay/awesome-shell): A curated list of shell tools and resources.
-- [awesome-osx-command-line](https://github.com/herrbischoff/awesome-osx-command-line): A more in-depth guide for the Mac OS command line.
+- [awesome-osx-command-line](https://github.com/herrbischoff/awesome-osx-command-line): A more in-depth guide for the OS X command line.
 - [Strict mode](http://redsymbol.net/articles/unofficial-bash-strict-mode/) for writing better shell scripts.
 - [shellcheck](https://github.com/koalaman/shellcheck): A shell script static analysis tool. Essentially, lint for bash/sh/zsh.
 - [Filenames and Pathnames in Shell](http://www.dwheeler.com/essays/filenames-in-shell.html): The sadly complex minutiae on how to handle filenames correctly in shell scripts.