The new MacBook Air has Wi-Fi issues -- so say owners in Apple's support community. This wouldn't be the first time that a new Apple product had Wi-Fi hiccups.
The MTU handling in OS X Mountain Lion may not work with the configuration for some Web servers, and might need to be adjusted.
In addition to using the system preferences, you can adjust Wi-Fi network configuration in OS X via Terminal.
Adjustments to certificate handling for some captive network setups may help overcome network access errors or blocks that prevent e-mail or Web access.
Adjusting some Flash and system settings may help when Flash Web content hangs or shows choppy performance.
MacFixIt Answers is a weekly feature in which we answer questions e-mailed from our readers. We welcome alternative approaches and views from readers and encourage you to post your own suggestions in the comments.
Tip: Increase Internet speed by manipulating MTU size
Users may find that a second internal or external hard drive suddenly no longer mounts.
Yet more tips for boosting Safari's performance.
Tips for boosting the performance of Apple's Web browser.