Merge pull request #80 from maps233-kk/patch-1

PR 80

https://github.com/cfig/Android_boot_image_editor/pull/80

README.md

@@ -12,6 +12,8 @@ Linux: `sudo apt install git device-tree-compiler lz4 xz-utils zlib1g-dev openjd
 
 Mac: `brew install lz4 xz dtc` 
 
+Mac: Make sure you have `JDK9+` properly installed.
+
 Windows Subsystem for Linux(WSL): `sudo apt install git device-tree-compiler lz4 xz-utils zlib1g-dev openjdk-11-jdk gcc g++ python`
 
 Windows: Make sure you have `python3`, `JDK9+` and `openssl` properly installed.