We strongly recommend that users regularly update their SketchUp. Mac users in particular will want to ensure their version of SketchUp is up to date: Mac OS/X 10.5 is only supported from version 6.4.120, and version 6.4x is required by IDX Renditioner Express.
On the Mac, open SketchUp, then select SketchUp from the menu bar and click on Check the Web for Updates. The application will inform you of whether or not there is a newer version available, and if you choose, it will take you to a page for the downloads.
On the PC, open SketchUp, the select Help from the menu bar and click on Check for Updates... This will inform you of any updates and download and install the right version for your system.
We recommend that you update your Sketchup before installing IDX Renditioner Express.