Mac App Store is the simplest way to find and download apps for your Mac.To download ReadNow from the Mac App Store, you need a Mac with Mac OS X 10.6.6 or later. Learn More. Description ReadNow gives you access to your Instapaper (Paid membership needed) or Read-it-Later (free) account in a single easy-to-use application. Within ReadNow you can manage your read later account without logging in to