Peachpit today announced the release of “Apple Training Series: Desktop and Portable Systems, Second Edition (US$54.999, by Owen Linzmayer. “This authoritative, Apple-Certified training course is designed both for professionals who support Apple computers as well as Mac enthusiasts who want to upgrade, service, or troubleshoot their favorite machines. Fully revised, this second edition covers Apple’s new models, including the popular Mac mini and the iMac G5,” notes the announcement.