removed "$" and changed Mac OS ---> MacOS

README.md

@@ -2,7 +2,7 @@
 
 This application provides display and control of Android devices connected on
 USB. It does not require any _root_ access. It works on _GNU/Linux_, _Windows_
-and _Mac OS_.
+and _MacOS_.
 
 ![screenshot](assets/screenshot-debian-600.jpg)
 
@@ -40,12 +40,12 @@ The client requires _FFmpeg_ and _LibSDL2_.
 Install the required packages from your package manager (here, for Debian):
 ```bash
 # runtime dependencies
-$ sudo apt install ffmpeg libsdl2-2.0.0
+sudo apt install ffmpeg libsdl2-2.0.0
 
 # build dependencies
-$ sudo apt install make gcc openjdk-8-jdk pkg-config meson zip \
-                   libavcodec-dev libavformat-dev libavutil-dev \
-                   libsdl2-dev
+sudo apt install make gcc openjdk-8-jdk pkg-config meson zip \
+                 libavcodec-dev libavformat-dev libavutil-dev \
+                 libsdl2-dev
 ```
 
 #### Windows
@@ -66,20 +66,20 @@ project. From an MSYS2 terminal, install the required packages:
 [MSYS2]: http://www.msys2.org/
 ```bash
 # runtime dependencies
-$ pacman -S mingw-w64-x86_64-SDL2 \
-            mingw-w64-x86_64-ffmpeg
+pacman -S mingw-w64-x86_64-SDL2 \
+          mingw-w64-x86_64-ffmpeg
 
 # build dependencies
-$ pacman -S mingw-w64-x86_64-make \
-            mingw-w64-x86_64-gcc \
-            mingw-w64-x86_64-pkg-config \
-            mingw-w64-x86_64-meson \
-            zip
+pacman -S mingw-w64-x86_64-make \
+          mingw-w64-x86_64-gcc \
+          mingw-w64-x86_64-pkg-config \
+          mingw-w64-x86_64-meson \
+          zip
 ```
 Java (>= 7) is not available in MSYS2, so if you plan to build the server,
 install it manually and make it available from the `PATH`:
 ```bash
-$ export PATH="$JAVA_HOME/bin:$PATH"
+export PATH="$JAVA_HOME/bin:$PATH"
 ```
 
 #### Mac OS
@@ -89,15 +89,15 @@ Use [Homebrew] to install the packages:
 [Homebrew]: https://brew.sh/
 ```bash
 # runtime dependencies
-$ brew install sdl2 ffmpeg
+brew install sdl2 ffmpeg
 
 # build dependencies
-$ brew install gcc pkg-config meson zip
+brew install gcc pkg-config meson zip
 ```
 Java (>= 7) is not available in Homebrew, so if you plan to build the server,
 install it manually and make it available from the `PATH`:
 ```bash
-$ export PATH="$JAVA_HOME/bin:$PATH"
+export PATH="$JAVA_HOME/bin:$PATH"
 ```
 
 ### Common steps
@@ -107,21 +107,21 @@ its directory. For example:
 
 [Android SDK]: https://developer.android.com/studio/index.html
 ```bash
-$ export ANDROID_HOME=~/android/sdk
+export ANDROID_HOME=~/android/sdk
 ```
 Then, build `scrcpy`:
 ```bash
-$ meson x --buildtype release --strip -Db_lto=true
-$ cd x
-$ ninja
+meson x --buildtype release --strip -Db_lto=true
+cd x
+ninja
 ```
 You can test it from here:
 ```bash
-$ ninja run
+ninja run
 ```
 Or you can install it on the system:
 ```bash
-$ sudo ninja install    # without sudo on Windows
+sudo ninja install    # without sudo on Windows
 ```
 This installs two files:
 
@@ -147,11 +147,11 @@ In that case, the build does not require Java or the Android SDK.
 Download the prebuilt server somewhere, and specify its path during the Meson
 configuration:
 ```bash
-$ meson x --buildtype release --strip -Db_lto=true \
-      -Dprebuilt_server=/path/to/scrcpy-server.jar
-$ cd x
-$ ninja
-$ sudo ninja install
+meson x --buildtype release --strip -Db_lto=true \
+    -Dprebuilt_server=/path/to/scrcpy-server.jar
+cd x
+ninja
+sudo ninja install
 ```
 
 ## Run
@@ -160,28 +160,28 @@ _At runtime, `adb` must be accessible from your `PATH`._
 
 If everything is ok, just plug an Android device, and execute:
 ```bash
-$ scrcpy
+scrcpy
 ```
 It accepts command-line arguments, listed by:
 ```bash
-$ scrcpy --help
+scrcpy --help
 ```
 For example, to decrease video bitrate to 2Mbps (default is 8Mbps):
 ```bash
-$ scrcpy -b 2M
+scrcpy -b 2M
 ```
 To limit the video dimensions (e.g. if the device is 2540×1440, but the host
 screen is smaller, or cannot decode such a high definition):
 ```bash
-$ scrcpy -m 1024
+scrcpy -m 1024
 ```
 If several devices are listed in `adb devices`, you must specify the _serial_:
 ```bash
-$ scrcpy -s 0123456789abcdef
+scrcpy -s 0123456789abcdef
 ```
 To run without installing:
 ```bash
-$ ./run x [options]
+./run x [options]
 ```
 (where `x` is your build directory).