add OSX installation instructions to README.md

README.md

@@ -9,3 +9,55 @@ Supported platforms:
 * maybe others?
 
 If you have multiple controllers connected at the same time, this software will combine their inputs.
+
+## OSX Installation Instructions
+Note that this process requires using the Terminal app and running commands.
+
+1. Install Apple Compiler Toolchain ([learn more here](https://developer.apple.com/documentation/xcode/installing-the-command-line-tools/))
+```bash
+xcode-select --install
+```
+
+2. Install [Homebrew](https://brew.sh/)
+```bash
+# check if you already have Homebrew:
+brew --version
+
+# to install Homebrew:
+/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+```
+
+3. Install Qt
+```bash
+brew install qt@5
+```
+
+4. Clone this repository
+```bash
+# choose somewhere to download the repo (e.g., ~/Downloads)
+cd ~/Downloads # or wherever
+git clone https://github.com/TuxSH/InputRedirectionClient-Qt.git
+cd InputRedirectionClient-Qt
+```
+
+5. Compile the Code
+For Apple Silicon Mac (M1/M2/M3/M4:
+```bash
+/opt/homebrew/opt/qt@5/bin/qmake
+make
+```
+For Older Intel-based Mac:
+```bash
+/usr/local/opt/qt@5/bin/qmake
+make
+```
+This will generate a `InputRedirectionClient-Qt.app`. Note that there may be compile warnings.
+
+6. Run the App
+
+Either double-click `InputRedirectionClient-Qt.app` or in terminal run:
+```bash
+open InputRedirectionClient-Qt.app
+```
+
+Optionally, you can add this to your Applications by dragging `InputRedirectionClient-Qt.app` into your `Applications` folder.