Update setup operation
@@ -44,6 +44,7 @@ Ruby must be able to build C-Extensions (e.g. MRI, Rubinius, not JRuby)
version 4.1.0.rc2 (#256). You can get ImageMagick from
<https://imagemagick.org>.
+### Ubuntu
On Ubuntu, you can run:
```sh
@@ -56,8 +57,25 @@ On Centos, you can run:
sudo yum install gcc ImageMagick-devel make which
```
-**Note to Windows users:** Please make sure that you choose an ImageMagick
-version that matches the bitness of your Ruby version.
+### macOS
+On macOS, you can run:
+
+```sh
+brew install pkg-config imagemagick
+```
+
+or you can run if you would like to use ImageMagick 6:
+
+```sh
+brew install pkg-config imagemagick@6
+```
+
+### Windows
+1. Install latest Ruby+Devkit package which you can get from [RubyInstaller for Windows](https://rubyinstaller.org).
+2. Download `ImageMagick-7.XXXX-Q16-x64-dll.exe` (not, `ImageMagick-7.XXXX-Q16-x64-static.exe`) binary from [Windows Binary Release](https://imagemagick.org/script/download.php#windows), or you can download ImageMagick 6 from https://legacy.imagemagick.org/script/download.php#windows
+3. Install ImageMagick. You need to turn on checkboxes `Add application directory to your system path` and `Install development headers and librarries for C and C++` in an installer for RMagick.
+<img width="50%" src="https://user-images.githubusercontent.com/199156/76685895-7688fb80-665a-11ea-9944-562dcd9badd0.png">
+
Installing RMagick
------------------
