Mac's don't need defragging as OS X automatically writes 2Gb or below sized files to one contiguous space on the drive. There are certain cases where's it's needed to free up a large spaces on the drive, but not something everyone has to do.

1. Apple has released Mac OS X 10.6.8, which fixes various VPN bugs and security issues, along with updating the Mac App Store in preparation for Lion's release.
2. Sep 28, 2015  You must determine what kind of CPU your Macbook has. From The Finder: 1. Open the Apple Menu in the upper left corner 2. Select 'About this Mac' 3. Since you have Snow Leopard, the 'About this Mac' dialog will appear, click on the button 'More In.

Far as other Mac maintainence, there really isn't any except to backup one's files regularly. Keeping Software Updated and run a web browser check to make sure the plug-ins are current.

Jun 27, 2011  The recently released Mac OS X 10.6.8 Software Update has quietly added native TRIM support to Macs equipped with SSD drives. TRIM insures that your SSD drive will be functioning at optimal speed and extends the life of the solid state disk, making this a must-have update for any Mac user using solid state storage. Mar 25, 2014  So in this video i am going to install Mac OS X Snow Leopard 10.6.3 with all it's hardware, kexts and drivers working, including WiFi, Graphics, Bootloader, Touchpad, Keyboard and more. Mac OS X Snow Leopard (version 10.6) is the seventh major release of Mac OS X (now named macOS), Apple's desktop and server operating system for Macintosh computers. Snow Leopard was publicly unveiled on June 8, 2009 at the Apple Worldwide Developers Conference. Apple has released Mac OS X 10.6.8, which fixes various VPN bugs and security issues, along with updating the Mac App Store in preparation for Lion's release.

For Safari and Flash, this check is more accurate

Most of those cleaning programs are junk, especially MacKeeper.

Facebook emoticons download for mac. If your friend got onto your computer and visited a bunch of adult sites, then I would recommend something like OnyX, doing ALL the cleaning and maintenance aspects and rebooting, perhaps followed by a Disk Utility Erase free space.

CCleaner beta is out for OS X, used on PC's and combines cleaning and scrubbing of the drive if setup correctly.

If your interested in performance, read my post here

Check compatibility

You can upgrade to OS Yosemite on any of the following Mac models. Your Mac also needs at least 2GB of memory and 8GB of available storage space.

MacBook introduced in 2009 or later, plus MacBook (13-inch, Aluminum, Late 2008)
MacBook Air introduced in late 2008 or later
MacBook Pro introduced in mid 2007 or later
Mac mini introduced in early 2009 or later
iMac introduced in mid 2007 or later
Mac Pro introduced in early 2008 or later
Xserve models introduced in early 2009

To find your Mac model, memory, storage space, and macOS version, choose About This Mac from the Apple menu . If your Mac isn't compatible with OS X Yosemite, the installer will let you know.

Make a backup

Before installing any upgrade, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.

Get connected

It takes time to download and install OS X, so make sure that you have a reliable Internet connection. If you're using a Mac notebook computer, plug it into AC power.

Download OS X Yosemite

For the strongest security and latest features, find out whether you can upgrade to macOS Catalina, the latest version of macOS.

If you still need OS X Yosemite, use this link: Download OS X Yosemite. A file named InstallMacOSX.dmg will download to your Mac.

Install the macOS installer

Double-click the downloaded file to open a window showing its contents. Then double-click the file within, named InstallMacOSX.pkg.

Follow the onscreen instructions, which will guide you through the steps necessary to install.

Begin installation

After installation of the installer is complete, open the Applications folder on your Mac, then double-click the file named Install OS X Yosemite.

Click Continue and follow the onscreen instructions. You might find it easiest to begin installation in the evening so that it can complete overnight, if needed.

Allow installation to complete

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both OS X and related updates to your Mac firmware.

Mac Os X Wikipedia

Learn more

Mac Os X 10.6.8 Daisydisk Mac

• OS X Yosemite won't install on top of a later version of macOS, but you can erase your disk first or install on another disk.
• You can use macOS Recovery to reinstall macOS.