Update PCB_GUIDE.md

diff --git a/keyboard/planck/PCB_GUIDE.md b/keyboard/planck/PCB_GUIDE.md
index a7a0f7fb18db671bac42e6db5061fa401c5e3770..3daf0e0092f5c2ada57f82c8e2942f3ffb8ad8f2 100644 (file)
--- a/keyboard/planck/PCB_GUIDE.md
+++ b/keyboard/planck/PCB_GUIDE.md
@@ -14,6 +14,7 @@ If you're using homebrew, you can use the following commands:
 
     brew tap osx-cross/avr
     brew install avr-libc
+    brew install dfu-programmer
 
 Otherwise, these instructions will work: