This is where Converter for Keynote comes in. Using Keynote Converter you can convert you old iWork 2008 (Keynote 4) presentations and then open them with iWork 2014 (Keynote 6). Without Converter for Keynote you will need to have Keynote '09 installed to do this. This useful and easy to use utility stops you having to buy or install iWork '09 just for this simple task.
If you do not have Keynote '09 on your Mavericks (OS X 10.9) or Yosemite (OS X 10.10) then you will be stuck. Or perhaps you have the install media for Keynote '09 but no CD Drive in your MacBook anymore? Again this is a problem that is very hard to solve. Even if you didn't buy a new version of iWork, our App can batch migrate Keynote '08 files to Keynote '09. There is no other Keynote converter App that can do this. All your files, migrated in a single click.