Like most software updates, the latest Safari update (version 5.1.4) causes changes to the system's configuration that will undoubtedly result in problems for some people's setups. Typically, even if no outstanding issues crop up in the software after an update, some people may find certain Web sites will not work or load correctly, and plug-ins might show odd behavior when displaying content.
- Reset Safari
In addition to using the Reset Safari window, you can manually empty the cache by choosing that option in the Safari menu, and you can remove individual Web site data such as cookies by clicking the small Details button in the program's Privacy preferences. If for instance you can get one Web site to work but can't get another one to work, then you can use this option to locate and remove the cookies for the second site without disturbing the settings for the first one.
- Adjust bitness
In order to maintain compatibility with plug-ins and other add-ons during the transition to 64-bit computing, Apple has included an option to load many of its programs (including Safari) in either 64-bit mode or 32-bit mode. If you are having trouble with some plug-ins not loading correctly or Web site content from apps such as Google Apps and YouTube not loading, and resetting Safari didn't help, then try checking or changing Safari's bitness.
To do this, locate the Safari.app file in the Finder, select it, and press Command-I to get information on it. In the information window there should be an option to open the program in 32-bit mode, so uncheck this if it is checked, or even try running in 32-bit mode if you are having troubles in the default 64-bit mode.
- Remove add-ons
In addition to plug-ins, Safari supports browser extensions, which like menu extras for OS X offer small functional boosts to the program such as social networking options. To manage these you can go to the Extensions section of Safari's preferences and turn this feature off, or individually manage extensions you have installed to see if they are contributing to the problem.
Unfortunately Safari does not have a plug-in manager similar to its extensions manager interface, but you can perform a similar management of plug-ins by removing them from the Internet Plug-Ins folders in your user library and the global library:
/Macintosh HD/Library/Internet Plug-Ins/
In OS X Lion the user library is hidden, but you can get to it by holding the Option key and choosing "Library" from the Finder's Go menu.
- Remove preferences
While in most cases problems with Safari have to do with add-ons, caches and other temporary items, or Safari settings, at times problems do occur because of errors in the program's preferences file. Therefore, you can try removing the various preferences files that Safari uses by quitting the program and going to the /username/Library/Preferences/ folder on your hard disk, and locating and removing any file that begins with "com.apple.Safari" in its name. When finished, relaunch the program and these files will be recreated from default settings.
- Check for residual Safari installations
Apple prefers that you keep application files directly in the /Macintosh HD/Applications/ folder; however, there are times when people may organize this folder by putting some programs in subdirectories, such as a directory for Browsers, Text Editors, or Games. With these setups, when you update the program may be installed twice and you might be running the older version of the executable even though the underlying frameworks and other support structure have been updated to work with the new executable. Therefore, go to the Applications folder and check to see if you have two versions of the Safari.app file. If so, then get information on them in the Finder to check their versions, and throw out the older one so you only have one copy of version 5.1.4.