PMBOK-5 ® Guide represents generally recognized good practice in the profession of project management.
The new PMBOK Guide 5th Edition has been published on December 31st 2008. It is now available to all PMI Members at the following page:
You will find a link with title A Guide to the Project Management Body of Knowledge (PMBOK. Guide), Fifth Edition which will be used to buy this version of PMBOK. So just click this link which will give you an option to add a copy of the standard in your shopping cart. At the moment its price is $65.95 for non-members and $49.50 for PMI members. Finally do a checkout and download its PDF version. Following procedure needs to be adopted while downloading your copy of PMBOK 5.
When you click the english version to download PMBOK ® Guide 5th edition this message will prompt like "The FileOpen system associates your member permissions to the publication" and prompts you to download and install the FileOpen Adobe Reader plug-in.
This step is required for first-time use only. Click Yes to begin installation of the Adobe Reader plug-in." Then after successfull installing Fileopen plugin, close the window and go back and download but you need to be a PMI member to access.
Mac uses Safari, which opens PDFs in the browser. That cannot work if security and other advanced functions are imbedded in the PDF. That requires a full version of PDF Reader or Adobe Acrobat installed.
Here is the APPLE support comment on reading PDFs with Safari. Adobe PDFViewer for Mac OS X will not run correctly on a system that doesn't meet the following requirements:
Mac OS X v10.3 and later
Adobe recommends Mac OS X version 10.3.4 and later and Safari version 1.2.3 (which comes with Mac OS X v10.3.5) and later.