The purpose of special argument -, which is supported by most utilities, is to signal that subsequent arguments should be treated as operands (values), even if they look like options due to starting with -, as Jacob C. Similar to the bash solution, s/././ performs text substitution, but - unlike in bash - true regular expressions are used.From the Finder window, click on the cog icon (Action button) or right. Here's the equivalent of the command at the top using rename: rename -n -e 's/_.*_/_/' *.pngĪgain, this command performs a dry run remove -n to perform actual renaming. To rename the hostname, we will follow a procedure similar to what we did when renaming the computer name. To batch rename file extensions using Mac: Open Finder. You can also right-click a partition in Finder (in Computername at the top level of the hierarchy), select Get Info, and enter the new name there. for example: /usr/sbin/diskutil rename 'Macintosh HD' 'Mac Disk'. On macOS you can install it using popular package manager Homebrew as follows: brew install rename To rename the volume, enter the following in Terminal: /usr/sbin/diskutil rename oldname newname. If you find yourself batch-renaming files frequently, consider installing a specialized tool such as the Perl-based rename utility.

Note that _*_ is a pattern (a wildcard expression, as also used for globbing), not a regular expression (to learn about patterns, run man bash and search for Pattern Matching).In your specific case you can use the following bash command ( bash is the default shell on macOS): for f in *.png do echo mv '$f' '$' is an application of bash parameter expansion: the (first) substring matching pattern _*_ is replaced with literal _, effectively cutting the middle token from the name. Earlier versions of macOS Choose Apple menu > System Preferences.

Macos rename