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Make sure your MacвЂ™s startup drive is in good health To do so, open Disk Utility (in /Applications/Utilities), select your startup drive in the list on the left, click the First Aid tab to the right, and then click Verify. If you perform the following tasks before the upgrade, youвЂ™ll have a much better chance of actually enjoying a pain-free experience.

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While Apple describes the process of upgrading to Mavericks as a simple download and install, those of us whoвЂ™ve been doing this for a while know that a major OS update is never that simple. In Snow Leopard, you get a System Profiler window-select Memory to check the RAM amount: Select Serial-ATA, and then select your driveвЂ™s name on the right, to see your free drive space. Click the Storage tab to view your driveвЂ™s free space, and click Memory to check the amount of RAM. In Mountain Lion and Lion, the resulting window displays, by default, your computer model and year/version. Not sure which Mac you own or how much RAM or free drive space it has? Choose About This Mac from the Apple Menu, and then click More Info.

In Lion and Mountain Lion, you can check your MacвЂ™s specs using the About This Mac window (left) Snow Leopard users can use Mactracker to identify their Mac model (right).

WeвЂ™ve also covered some specific suggestions for freeing up drive space. (You may also find, especially if youвЂ™re upgrading from Snow Leopard, that some of MaverickвЂ™s features require more вЂњeverydayвЂќ free space, as was the case with Lion and Mountain Lion.) If you need to free up space on your drive, you can use a utility such as WhatSize or GrandPerspective to help you find big files you can get rid of.

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Similarly, Apple states that you should have at least 8GB of free space on your MacвЂ™s drive to install a major OS X update, but I recommend playing it safe by aiming for 15GB to 20GB-the Mavericks installer itself is 5.3GB in size, and youвЂ™ll need some room for temporary files. Most reputable vendors will make it clear which RAM they offer is compatible with Macs.

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Some third-party RAM thatвЂ™s not up to AppleвЂ™s specs will cause problems when you upgrade your OS. A word of advice here: If you donвЂ™t buy your RAM directly from Apple, be sure you get RAM thatвЂ™s specifically guaranteed for use in Macs. If you have only 2GB installed-and especially if you have only 1GB-you should consider a hardware upgrade, if thatвЂ™s possible with your particular Mac model, before installing Mavericks. (Note that while all of the above computers can install Mavericks, some features, such as Power Nap, AirPlay mirroring and extended desktop, and AirDrop, have stricter requirements.)ДЄpple also says you need at least 2GB of RAM (memory), but in my experience, youвЂ™ll enjoy better results with at least 4GB.

MacBook Pro 17-inch (Late 2007 or newer).

MacBook Pro 15-inch (Mid/Late 2007 or newer).

MacBook Pro 13-inch (Mid-2009 or newer).MacBook (Late 2008 Aluminum, or Early 2009 or newer).

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