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os_show_filename_extensions_enable Enable Show All Filename Extensions

NIST macOS Security Compliance Project Sequoia Guidance, Revision 4.0 (be5491f)
All changes in this version
first version loaded macOS

Title

Enable Show All Filename Extensions

Control

/usr/bin/sudo -u "$CURRENT_USER" /usr/bin/defaults read .GlobalPreferences AppleShowAllExtensions 2>/dev/null

Discussion

Show all filename extensions _MUST_ be enabled in the Finder.

[NOTE]
====
The check and fix are for the currently logged in user. To get the currently logged in user, run the following.
[source,bash]
----
CURRENT_USER=$( /usr/sbin/scutil <<< "show State:/Users/ConsoleUser" | /usr/bin/awk '/Name :/ && ! /loginwindow/ { print $3 }' )
----
====

Fix

[source,bash]
----
/usr/bin/sudo -u "$CURRENT_USER" /usr/bin/defaults write /Users/"$CURRENT_USER"/Library/Preferences/.GlobalPreferences AppleShowAllExtensions -bool true
----