Instructions on converting a folder of FLAC files to ALAC M4A.

flac-to-m4a.sh

# install ffmpeg via homebrew - visit brew.sh if you don't have Homebrew
brew install ffmpeg

# cd to directory of FLAC files
cd /path/to/flacs/

# run the magic one-liner
for i in *.flac; do ffmpeg -i "$i" -acodec alac "`basename "$i" .flac`.m4a"; done;