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MAC OS X Snow Leopard 10.6.2 SSE2-SSE3 For INTEL-AMD | 3,56 Gb
Installation of Snow Leopard is dead simple and (according to Apple) up to 45 percent faster than Leopard using a newly designed installer that asks only one question during the process. On our test machine, the process took about an hour, including two automatic restarts. The default setting installs Snow Leopard without tampering with any of your saved files, music, photos, or documents. Mostly we had no problems, but on one test machine we needed to reinstall the OS when it had trouble rebooting. Fortunately the new installer is designed for safely reinstalling the OS in the event you encounter any hiccups during your initial installation. On our second try, the OS installed perfectly on our test machine and no files were harmed. PowerPC Macs are no longer supported with Snow Leopard, however; you will need an Intel-based Mac to install the latest Mac OS.
Those who want to do a "Clean Install" (starting fresh by deleting everything for minimal conflicts) still can, but unlike installations in previous versions of previous Mac OS X that offered the clean install as a primary option, you'll need to use Disk Utility to first erase the volume, then run the install. Apple explained to us that not everyone knows what a clean install is and often chose it, not knowing that they would lose their files. We're happy with that answer, as long as people still get the option in some form.
Apple also claims that Snow Leopard uses 7GB less space than Leopard because of better file compression paired with selective driver inclusion. According to Apple, Snow Leopard will locate any missing drivers on the Web for you. We had no need of any special drivers during our tests.
Apple says a few new technologies in Snow Leopard make it worthy of the upgrade alone, with several features that Apple says will boost performance. Because all new Macs come with 64-bit multicore processors, multiple GBs of RAM, and high-powered graphics processing units, all the major applications in Snow Leopard--including the Finder--have been rewritten in 64-bit to take full advantage of the hardware. (The 64-bit technology allows application developers to allocate more memory to complete tasks so that the software runs faster and more smoothly.)
Apple has also added what it calls the Grand Central Dispatch that manages data sent to multicore processors in an effort to maximize performance; Apple says the GCD will speed up any application task, from processing images in Photoshop to playing your favorite games. The addition of the GCD also takes away the need for software developers to spend as much time managing multicore processors.
Another new technology in Snow Leopard is OpenCL, which allows software developers to tap into the power of any onboard video cards (or GPUs, for graphics processing units) for general-purpose computing without the addition of enormous amounts of code. Like the GCD, these are improvements that will mainly affect software developers. But hopefully it will mean more and better-performing software for users in the future.
To put some of these claims to the test, we decided to pit Mac OS X 10.5.8 Leopard against Mac OS X 10.6 Snow Leopard to see how these new technologies affected overall performance.
In our anecdotal tests of performance within the Snow Leopard user interface (UI), the operating system seems faster and more responsive than with Leopard. Finder, Stacks, Expose, launching apps, and other everyday processes feel snappy. We didn't, however, notice any improvement in application performance.
Overall, we saw only a 2.5 percent slowdown in application performance from Leopard to Snow Leopard on our more processor-intensive performance tests, including our multimedia multitasking test, in which we measure the time for QuickTime to finish converting a short movie while iTunes is performing its own conversion of MP3 into AAC format in the background simultaneously. As this falls within our typical margin of error (5 percent), we saw no significant difference with application performance when moving from Leopard to Snow Leopard
Snow Leopard includes a number of user UI improvements intended to make working with Mac OS X easier and more efficient. Expose, Apple's system for visually finding the window you want on a cluttered desktop, used to be relegated to the Function keys on your keyboard. Snow Leopard now makes Expose accessible from the Dock; just click and hold on a Dock icon to see thumbnails of all the open windows in that application. Hitting the Tab key lets you cycle through the preview thumbnails of each open application. Using Expose in the Dock is very natural and elegant, making us wonder why this wasn't already a feature in Leopard.
In addition to using Expose to find the right window, you now also have the ability to drag files from one application to another using the Dock. Let's say you want to add an image to an e-mail, but your desktop is full of open windows. In Snow Leopard you can go to the image, drag it to the Mail icon in the Dock, and your e-mail window will spring-load, allowing you to drop the image into place. Though the ability to drag and drop files in this fashion is nice, we're not sure it's much easier than attaching an image by browsing through your folders. Still, if you know the image is already on your desktop, it's probably the faster method.
Stacks got a much-needed upgrade as well. In Leopard, Stacks only listed a certain number of files and applications requiring you to go to a Finder window if your app wasn't listed. Similarly, if you tried to open a folder in Stacks, you were sent to the Finder. In Snow Leopard, Stacks comes with a scroll bar so icons are still easy to read and anything can be launched out of the Dock. Folders are now accessible within Stacks as well, so you'll be able to navigate to files within folders all without leaving the Stacks Window. These changes make Stacks much more useful than before and probably should have been available when Stacks was introduced.
While the Finder itself saw little in the way of interface tweaks, the way files behave in the Finder makes it easier to use. A zoom slider has been added to the lower right of Finder windows so you can zoom in on icons. An enhanced icon view has been added, letting you preview multipage documents and even play QuickTime movies without ever leaving the Finder window.
Preview now lets you preview almost any file, even if it was created with software you don't have on your hard drive. This means common file types from Microsoft Excel, PowerPoint, and even PDF files can all be previewed without owning the programs they were created in. As an added bonus, Preview in Snow Leopard provides accurate text selection to multicolumn PDF files using artificial intelligence to infer the layout of each page. This means that Preview recognizes that there are multiple columns in your document so you can select the text you want from any column.
Safari 4 has been widely available for some time, but it offers a couple of new features when running in Snow Leopard. Safari 4 already includes Top Sites for viewing all your favorite sites as thumbnails for easy access and full history search, which lets you view your history in a Cover Flow-like interface. But in Snow Leopard, Safari is now crash resistant. This means that if a plug-in crashes, it won't crash the whole browser. Simply refresh the page to try to load the plug-in again. Also, Safari checks to see if a site you are visiting is known to be fraudulent, is distributing malware, or is known to be a phishing site, and then warns you if it is
QuickTime X, Apple's media player, got some major tweaks in Snow Leopard. Now, when you play a movie and move your mouse outside the window, the interface fades away quickly to give you a more immersive video-viewing experience. When watching a movie, you can click the new Share button to convert your movie for iPod, iPhone, or Apple TV, and QuickTime converts the video to work best on your chosen device. You also can now record video from your Webcam, audio, or just the action on your screen with a few clicks. Those with the iPhone 3GS will recognize the new trimming feature in QuickTime X, letting you grab just the video content you want.
QuickTime X probably received the most interface tweaks in the Snow Leopard update. The cleaned-up interface and autofade features look great (like most things Apple), but it's more of an aesthetic improvement than anything else. The recording features for video, audio, and screencast capturing are the big wins here and used to be offered only in QuickTime Pro. It's good to see these features will be able to be used by a wider audience in Snow Leopard.
Trim your videos easily by clicking and dragging start and end points of the clip.
One of the main roadblocks for Mac users in a primarily Windows workplace was the inability to connect with Microsoft Exchange servers. Most Mac users used Microsoft Entourage or available open-source options as a work-around, but it was never as smooth as connecting from a Windows machine with Microsoft Office. Snow Leopard now supports Microsoft Exchange Server 2007 out of the box so you can easily connect using Apple's Mail app, grab global address lists in the Address Book, and create meetings with contacts using iCal.
Apple did more than simply give you the ability to connect, however. Common tasks like creating meetings, for example, are incredibly easy with intuitive controls. iCal lets you view work events and personal activities all in the same window (with easy controls to include or not include the information you want). The Apple Address Book works seamlessly across Mail and iCal so you can quickly bring up global address lists, add people to a meeting (including predesigned groups), and invitations will automatically be sent to each attendee. As an added bonus, if some attendees have scheduling conflicts with your proposed meeting time, iCal will automatically figure out the earliest available time that everyone is free. These are features already available in Microsoft's Outlook for Windows, but in Snow Leopard the process feels much more intuitive.
According to Apple, File Quarantine has also been refined in Snow Leopard. First introduced in Mac OS X 10.4 Tiger, File Quarantine checks for known malware signatures, and in Snow Leopard, will now display an alert dialog if it finds a known offender. The dialog will tell users to move the offending file to the Trash. For example, a bogus version of iWork circulated on the Web a few months ago that contained malware. That particular malware is now automatically detected by File Quarantine in Snow Leopard.
Apple says that File Quarantine will be automatically updated via Mac OS X's software update as new malware signatures are found in the wild. We had no way to test these features, but we are happy to see that Apple is taking strides to defend against malware as more people switch to Macs and the danger of new malware becomes more prevalent.
Beginning with Mac OS X 10.4 Tiger, Apple included VoiceOver to help people who are blind or with impaired vision to better understand and interact with what is happening onscreen. Apple continues to help visually impaired users in Snow Leopard by adding gesture support on multitouch trackpads with easy-to-learn gestures to perform specific functions. We had mixed results with these features depending on the Web page we visited, but mostly we found the features to be useful. The trackpad acts as the viewable area on the current window so you can tap to have Window elements explained to you or swipe to move on to the next item in the window, for example. New features in Snow Leopard are particularly helpful when Web browsing, with options like Web page summaries to explain the various elements on a Web page you haven't visited before, making it easier to get the information you want.
More than 40 different Braille displays (including wireless Bluetooth displays) are supported in Snow Leopard right out of the box, allowing visually impaired users to plug in and start computing immediately.
Some of the smaller refinements in Snow Leopard are worthy of note, affecting many of Apple's core apps.
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