Getting the name of the current Mac Aerial screensaver/wallpaper

wallpaper.sh

#!/bin/bash

# Print the name of the current Mac Aerial screensaver/wallpaper
# requires jq (brew install jq)

LANG=$(defaults read -g AppleLocale | cut -c1-2) # this is not going to work for all locales
WALLPAPERS="/Library/Application Support/com.apple.idleassetsd/Customer/entries.json"
DESCRIPTIONS="/Library/Application Support/com.apple.idleassetsd/Customer/TVIdleScreenStrings.bundle/$LANG.lproj/Localizable.nocache.strings"

# get the path of the current wallpaper video by looking at the files the WallpaperVideoExtension process has open
WPATH=$(lsof -F n -p $(pgrep WallpaperVideoExtension) | grep ".mov" | cut -c2-)
# grab the ID of the wallpaper
WID=$(basename "$WPATH" .mov)
# look up the localized string key for that wallpaper
NAME_KEY=$(jq -r ".assets[] | select(.id==\"$WID\") | .localizedNameKey" "$WALLPAPERS")
# grab the description for that key
DESC=$(plutil -extract "$NAME_KEY" raw "$DESCRIPTIONS")

echo $DESC

Thanks so much for this! I asked about this today on Apple SE and linked your Stack Overflow answer as the answer.

Crazy how hard it is to get such a simple piece of information!

Seems the Tahoe moved things around a bit, I've got an updated version of this script in my fork of this gist.