El comando Sudo 'Uninstall' no se reconoce en el terminal

Si sólo quieres eliminar los archivos de la aplicación, puedes escribir rm -Rdf seguido de la ruta del archivo.

Si quieres eliminar también otros archivos dejados por la app (como las preferencias y las cachés), puedes usar el script que incluyo a continuación.

#!/bin/sh

if [ -z "$1" ]; then
  printf "%s\n" "Usage: uninstall /path/to/app.app"
  exit 1
fi

IFS=$'\n'

red=$'\e[1;31m'
nc=$'\e[0m'

if [ ! -e "$1/Contents/Info.plist" ]; then
  printf "%s\n" "Cannot find app plist"
  exit 1
fi

bundle_identifier=$(/usr/libexec/PlistBuddy -c "Print CFBundleIdentifier" "$1/Contents/Info.plist" 2> /dev/null)

if [ "$bundle_identifier" = "" ]; then
  printf "%s\n" "Cannot find app bundle identifier"
  exit 1
fi

printf "%s\n" "Checking for running processes..."
sleep 1

app_name=$(basename $1 .app)

processes=($(pgrep -afil "$app_name" | grep -v "uninstall"))

if [ ${#processes[@]} -gt 0 ]; then
  printf "%s\n" "${processes[@]}"
  printf "${red}%s${nc}" "Kill running processes (y or n)? "
  read -r answer
  if [ "$answer" = "y" ]; then
    printf "%s\n" "Killing running processes..."
    sleep 1
    for process in "${processes[@]}"; do
      echo $process | awk '{print $1}' | xargs kill 2>&1 | grep -v "No such process"
    done
  fi
fi

home_dir=~

paths=()

paths+=($(find /private/var/db/receipts -iname "*$app_name*.bom" -maxdepth 1 -prune 2>&1 | grep -v "Permission denied"))
paths+=($(find /private/var/db/receipts -iname "*$bundle_identifier*.bom" -maxdepth 1 -prune 2>&1 | grep -v "Permission denied"))

if [ ${#paths[@]} -gt 0 ]; then
  printf "%s\n" "Saving bill of material logs to desktop..."
  sleep 1
  for path in "${paths[@]}"; do
    mkdir -p "$home_dir/Desktop/$app_name"
    lsbom -f -l -s -p f $path > "$home_dir/Desktop/$app_name/$(basename $path).log"
  done
fi

printf "%s\n" "Finding app data..."
sleep 1

locations=(
  "$home_dir/Library"
  "$home_dir/Library/Application Support"
  "$home_dir/Library/Application Support/CrashReporter"
  "$home_dir/Library/Containers"
  "$home_dir/Library/Caches"
  "$home_dir/Library/Group Containers"
  "$home_dir/Library/Internet Plug-Ins"
  "$home_dir/Library/LaunchAgents"
  "$home_dir/Library/Logs"
  "$home_dir/Library/Preferences"
  "$home_dir/Library/Saved Application State"
  "$home_dir/Library/WebKit"
  "/Library"
  "/Library/Application Support"
  "/Library/Application Support/CrashReporter"
  "/Library/Caches"
  "/Library/Extensions"
  "/Library/Internet Plug-Ins"
  "/Library/LaunchAgents"
  "/Library/LaunchDaemons"
  "/Library/Logs"
  "/Library/Preferences"
  "/private/var/db/receipts"
  "/usr/local/bin"
  "/usr/local/etc"
  "/usr/local/opt"
  "/usr/local/sbin"
  "/usr/local/share"
  "/usr/local/var"
  $(getconf DARWIN_USER_CACHE_DIR | sed "s/\/$//")
  $(getconf DARWIN_USER_TEMP_DIR | sed "s/\/$//")
)

paths=($1)

for location in "${locations[@]}"; do
  paths+=($(find "$location" -iname "*$app_name*" -maxdepth 1 -prune 2>&1 | grep -v "No such file or directory" | grep -v "Operation not permitted" | grep -v "Permission denied"))
done

for location in "${locations[@]}"; do
  paths+=($(find "$location" -iname "*$bundle_identifier*" -maxdepth 1 -prune 2>&1 | grep -v "No such file or directory" | grep -v "Operation not permitted" | grep -v "Permission denied"))
done

paths=($(printf "%s\n" "${paths[@]}" | sort -u));

printf "%s\n" "${paths[@]}"

  printf "%s\n" "Moving app data to trash..."
  sleep 1
  posixFiles=$(printf ", POSIX file \"%s\"" "${paths[@]}" | awk '{print substr($0,3)}')
  osascript -e "tell application \"Finder\" to delete { $posixFiles }" > /dev/null
  printf "%s\n" "Done"

Sugiero mantener este script en algún lugar de tu $PATH, para que puedas ejecutarlo desde cualquier lugar.

Hice un acceso directo que te permite lanzar este script sin tener que usar la línea de comandos. Te pide que selecciones la aplicación y la interacción es tan fácil como lo es con herramientas como AppCleaner mencionadas en un comentario.

https://www.icloud.com/shortcuts/a4b8397f95e74a49b4e80b72be50b273

También puede lanzar este scripts utilizando otras herramientas de automatización gráfica, como Automator, Keyboard Maestro, Alfred o BetterTouchTool.