A ruby script to list 32-bit apps installed in macOS - in preparation of upgrading to macOS Catalina

list-32-bit-apps

#!/usr/bin/env ruby

#   Run `gem install plist` to resolve the only dependency.
#
#   This script creates two files in the directory that you run the script from
#

require 'plist'
require 'yaml'

RAW_FILENAME       = "all_apps.plist"
APPS_LIST_FILENAME = "32bit-apps.yaml"

puts "Querying system_profiler..."

raw = %x(system_profiler -nospawn -xml SPApplicationsDataType -detailLevel full)
File.open(RAW_FILENAME, "w+") { |f| f.write(raw) }

puts "Parsing response..."

response = Plist.parse_xml(raw)
apps     = response[0]["_items"]

apps_32bit = apps.select { |item| item["has64BitIntelCode"] == "no" }.sort_by { |item| item["_name"] }

output = apps_32bit.map do |app|
  {
    "name" => app["_name"],
    "path" => app["path"],
    "from" => app["obtained_from"]
  }
end

File.open(APPS_LIST_FILENAME, "w+") { |f| f.write(output.to_yaml) }

puts <<-EOF
Done.

Found #{apps_32bit.size} 32-bit app#{apps_32bit.size == 1 ? '' : 's'}.

Created files:

> #{APPS_LIST_FILENAME}
  - Contains a list of 32-bit applications installed

> #{RAW_FILENAME}
  - A plist (xml) with details of ALL applications installed

EOF