unix2mac
Convert Unix line endings to classic Mac format
TLDR
Convert a file to classic Mac line endings (CR) in place
$ unix2mac [path/to/file]
Write converted output to a new file$ unix2mac -n [path/to/file] [path/to/new_file]
Display file information without converting$ unix2mac -i [path/to/file]
Convert and keep the original file timestamp$ unix2mac -k [path/to/file]
Force conversion of binary files$ unix2mac -f [path/to/file]
SYNOPSIS
unix2mac [options] [file...]
DESCRIPTION
unix2mac converts text files from Unix line ending format (LF) to classic Mac format (CR). This format was used by Mac OS 9 and earlier. Modern macOS uses Unix-style LF line endings.The tool is primarily useful for compatibility with legacy Mac software or when working with files that specifically require CR line endings.
PARAMETERS
-n, --newfile INFILE OUTFILE
Write to new file instead of modifying in place.-o, --oldfile FILE
In-place conversion (default mode).-i, --info [FLAGS]
Display file information without converting.-k, --keepdate
Keep output file date same as input.-f, --force
Force conversion of binary files.-s, --safe
Skip binary files (default).-b, --keep-bom
Keep Byte Order Mark.-m, --add-bom
Add UTF-8 Byte Order Mark.-r, --remove-bom
Remove Byte Order Mark.-q, --quiet
Quiet mode, suppress warnings.-v, --verbose
Display detailed conversion information.-l, --newline
Add additional newline.-F, --follow-symlink
Convert symbolic link targets.
INSTALL
sudo apt install dos2unix
sudo dnf install dos2unix
sudo pacman -S dos2unix
sudo apk add dos2unix
sudo zypper install dos2unix
brew install dos2unix
nix profile install nixpkgs#dos2unix
CAVEATS
Classic Mac line endings (CR only) are rarely needed today as modern macOS uses LF. Binary files should not be processed. Part of the dos2unix package.