```
brew rm avr-gcc
brew rm dfu-programmer
+brew rm dfu-util
brew rm gcc-arm-none-eabi
brew rm avrdude
brew install avr-gcc
brew install dfu-programmer
+brew install dfu-util
brew install gcc-arm-none-eabi
brew install avrdude
```
```
brew uninstall --force avr-gcc
brew install avr-gcc@7
-brew link avr-gcc@7
+brew link --force avr-gcc@7
```