Using tab to jump through form fill outs

Using the TAB key makes you select the drop down box or buttons, but to activate it, you have to press the SPACEBAR and then make your selection via the arrows or first letters.

And have a look at what r.j.s. wrote about System Preferences. That might be the culprit.


Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.

Mac OS X Basics

Switch 101 - guide with articles made by Apple on how to accustom yourself, after you switched to Mac OS X from Windows​

Mac 101 - How to get started with Mac OS X​

Find out how - tutorial videos made by Apple on how to do certain thing in Mac OS X​

Pro tips - tips made available by Apple for easier ways of doing certain tasks​

Mac OS X Keyboard Shortcuts - Learn about common Mac OS X keyboard shortcuts.​

Mac OS X Beginner's Guide by MacRumors - learn about software, media players, shortcuts and some useful tips, tricks and hints​

Mac Guides - tutorials, product guides and more​

Mac Guides - Finding Mac Software​

MRoogle - a very effective tool to search these fora using Google and made available by edesignuk, introductory threads: 1, 2 and 3​

"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006​

 

System Prefs > Keyboard ... at the bottom, check All controls.