The downloaded file will be named X17-15993.dmg. Step 3 Click on the big Download Now button. Either copy and paste into your location bar or simply click here.Step 1 Visit the Mac 2011 Trial download page. At least 2.5 GB of available hard disk space.Think you're tough enough to resist Steve Ballmer's siren song? A step-by-step guide follows below. Please enable JavaScript to watch this video.