And you just need to follow the instructions shown on the screen
On the other hand, after completing a backup of the Snow Leopard system, open the Mac App Store and buy Lion's license. But before installing, open the Applications folder of Mac, right-click on Lion's installation file:
Select Show Package Contents and open the Shared Support folder, where we will see the image file named InstallESD.dmg - this is Lion's image file, copy this file to the Desktop. Start the Disk Utility , click the Burn button and when the system displays the process confirmation message, select the InstallESD.dmg file from the Desktop and burn it to DVD.
Until now, the effects of Lion have been undeniable, in terms of both technology and graphical interface, it is clear that Apple's progress is extremely solid. But there are still some minor problems, the appearance of iCal and Address Book is one of those problems.
However, you can use MacNix support tool to change the interface of iCal to be the same as the screenshot above, but you need to pay attention to backup the program before proceeding to prevent risk.
Up to this point, Finder has not been able to get out of Apple's system, although its features sometimes go beyond the control of many users, for example, they cannot lock some folders, Library, cannot see the total remaining space . To restore access to the Library as usual, open Terminal and type the following command:
chflags nohidden ~ / Library /
If you want to check the volume of the partition, just open a new Finder window and select View> Show Status Bar.
Next, the controversial change of Mac OS X Lion is to completely change Trackpad's original information processing. Most of these problems can be changed or fixed with just a few operations or Terminal commands, but with Trackpad it is not easy because this is a multi-touch processor. All you need to do is open System Preferences> Trackpad> Scroll & Zoom> Scroll Direction: Natural, then uncheck this box. Besides, you can refer and use Better Touch Tool support tool.
Along with the appearance of the Lion version this time, the developers will have to try harder to 'catch up' Lion. For sure, you should refer to the list of OS X Lion support programs here.
Similar to Trackpad , changes in the Scrollbar section bring no less hassle to users. And to change it, you just need to select System Preferences> General and change Show Scroll Bars settings to Always .
Most Mac OS users use Spaces, and they do not like the way the operating system 'decides' the Desktop itself to organize programs or applications. To change it, open System Preferences -> Mission Control and uncheck the Automatically rearrange spaces box based on most recent use.
Good luck!