Find non-ASCII characters in macOS

May 28, 2022 · 1 min read · Post a comment

In these modern days, ASCII as a character encoding standard is a subset of UTF-8. As for the other OS-related posts refer to:


  • Shell environment
  • Homebrew


Step 1. Install the GNU version of grep.

brew install grep

Note(s): Although grep is installed by default as part of coreutils, brew doesn’t automatically replace it, instead it adds a prefix g, so you can call it as ggrep.

Step 2. Run the following command:

ggrep --color='auto' -P -n "[\x80-\xFF]" somefile.txt


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