Add useful commands for Mac

README.md

@@ -20,11 +20,12 @@ It also includes a dev setup for `zsh` (aliases, functions, etc).
   - [.aliases](./dev-setup/.aliases)
   - [.functions](./dev-setup/.functions)
   - [kubectl aliases](./dev-setup/kubectl-aliases.md)
+- **[Useful Mac commands](./mac-cli.md)**
 
 ### Order of Operations
 
 This is the order in which these files get read. Keep in mind that it reads first from the system-wide file (i.e. `/etc/zshenv`) then from the file in your home directory (`~/.zshenv`) as it goes through the following order:
 
 `.zshenv` → `.zprofile` → `.zshrc` → `.zlogin` → `.zlogout`
 
-Details - [What should/shouldn't go in .zshenv, .zshrc, .zlogin, .zprofile, .zlogout?](https://unix.stackexchange.com/q/71253/107777)
+Details - [What should/shouldn't go in .zshenv, .zshrc, .zlogin, .zprofile, .zlogout?](https://unix.stackexchange.com/q/71253/107777)

mac-cli.md

@@ -0,0 +1,15 @@
+# Useful commands for Mac
+
+## Appending images in ImageMagick
+
+For vertical stacking (top to bottom):
+
+```
+convert -append 1.jpg 2.jpg out.jpg
+```
+
+For horizontal stacking (left to right):
+
+```
+convert +append 1.jpg 2.jpg out.jpg
+```