Mac users using Preview have reported problems with opening e-book PDF files in ENGnetBASE and other CRCnetBASE products. To resolve this issue, we recommend downloading Adobe Reader and installing it as a browser plug-in.

CRCnetBASE titles need Adobe Reader to open within the browser to work properly on both Macs and PCs.  To make sure that Adobe Reader opens within your browser, check the "Display PDF in browser" option within your Adobe Reader preferences.