Mac Geek Gab #120: Passwords Explained, RAM Utilization, and .Mac Sync Usefulness

John and Dave delve into the intricacies of Mac OS X's password hashing mechanisms, correcting misconceptions from previous episodes. Wally clarifies that password hashes are based on the first eight characters of the encrypted password, meaning longer passwords with the same initial segment can produce different hashes. They discuss how OS X encrypts and stores hashed passwords and the implications for security, emphasizing that longer, unique passwords are better despite the hashing limitations.

The hosts address misinformation about firmware passwords on Intel Macs, confirming that Apple provides a utility for setting firmware passwords even on Intel hardware. They discuss methods to enable firmware passwords, including using the utility located in the Utilities folder, and emphasize that adding this layer of security can help prevent unauthorized modifications—though it’s not impenetrable.

A listener provides a tip for restricting access to applications by changing user and group permissions, suggesting that placing apps into specific groups and setting execution permissions can control who can run certain software. The hosts reference a helpful article on Mac OS X security management, highlighting that such permissions can serve as an additional security layer, especially in shared or institutional environments.

John and Dave compare their experiences with DotMac (now MobileMe) syncing, describing how it manages contacts, calendars, keychains, and bookmarks across multiple Macs. They discuss the setup, benefits, and issues like slow sync times and conflicts, noting that while it generally works well for them, some frustrations remain. Enthusiasm for alternative solutions like third-party sync tools is expressed.

A listener reports a corrupted external drive after accidental disconnection. The hosts discuss various strategies to recover data, including running disk utilities, DiskWarrior, Drive Genius, and considering professional data recovery services. They highlight the importance of using journaling file systems and proper ejection procedures, and suggest removing the drive from external enclosures to attempt repair via internal connections, advocating caution to avoid further data loss.

An audience member seeks to change the default ‘Copy of’ suffix in duplicated files. John explains how to modify Finder’s string resources by editing system files, specifically within 'localizable.strings,' to replace ' copy' with a user-chosen character. Caution is advised due to the risks of editing system files, emphasizing making backups before proceeding.

The hosts promote the upcoming Portable Media Expo, describing the event’s attractions, including live performances, vendors, and raffles, emphasizing the community aspect of podcasting. They also mention their plans for the next show, themed around their recent birthday celebrations and new gear such as an iPod Nano, encouraging listener questions and reviews.

Various small tips are shared, including methods to wake a sleeping Mac over Ethernet using Apple Remote Desktop or third-party utilities like WakeOnLan, and the benefits of connecting printers directly via Thunderbolt or AirPort Base Stations. The hosts also discuss other potential solutions like dedicated print servers or simple Ethernet adapters, stressing that community-shared ideas make the podcast valuable.