1. Download the iWork '09 Trial (dmg file) from Softpedia link . Click Download and click External Mirror 1 . You have to download this from softpedia because Apple doesn't support Trial downloads of Apps any longer.
2. Go to your System Preferences -> Security & Privacy -> General -> Change Allow apps downloaded from to Anywhere
3. When the download is complete double click the dmg file and install the iWork '09 Trial.
4. Once the installation is finished wait for a few seconds and open your App Store in Mac and click the Updates section. Now you can see that 3 new updates for Pages, Keynote and Numbers appear on the list. Update them and you can enjoy all 3 incredible apps free for life.
|Get Keynote, Pages and Numbers for free in older macs|
If you admire my effort, consider giving +1 to this post and Subscribe me in Facebook. You can also Follow Me on Twitter to get all the new stuffs I share.