1Password 4 has arrived on the Mac (finally). I’ve been a 1Password user for about a year now and I’ve been beta testing version 4 for Mac for several weeks. It’s a great update. The new design is beautiful and useful; the icon is great, too. With Mavericks shipping later this month (hopefully) and iCloud Keychain going live between iOS and OS X, 1Password is about to face their biggest competition yet. Ironically, my favorite addition to 1Password 4 is iCloud sync.