Can I "clean" Install Lion without SL?
Not according to Apple. The latest version of Snow Leopard is required.
Apple - OS X Lion - Get Lion in July. Only from the Mac App Store. Lion requires an Intel-based Mac with a Core 2 Duo, i3, i5, i7 or Xeon processor and 2GB of RAM. The Lion upgrade can be installed on all your authorized personal Macs.
Performing a clean install of Lion is easy once you create a Lion Boot Disc. How do I create a Lion Boot Disc, you ask? That's easy too! Just follow these instructions: http://www.macrumors.com/2011/07/18/make-an-os-x-lion-boot-disc/
The fact is that the Lion installer is packaged around a bootable disk image that can easily be burned to a standard 4.7GB DVD. With the boot disk you can run disk utility to erase your Mac, and then clean install just like you could with every other version of Mac OS X. Just don't forget to backup all your data!!!
myimagination's Mac OS Lion FAQ.
Topics covered in the FAQ.
0. Cautions / Before Upgrading.
1. Apple UpToDate Program.
2. How many Macs?
3. Re-downloading from App Store?
4. Reinstalling Lion. (Clean Install)
5. Making a Lion DVD.
(further updates will be posted when im online)
I've got some questions and I'll be really pleased if someone can clean up my mind about them.
I've heard about a way to 'jump' the Snow Leopard 10.6.x version from Leopard 10.5.8. I mean passing from Leopard to Lion modifying a file located in /System/Library/CoreServices, it's only to change from 10.5.8 to 10.6.x
or whatever in the file 'SystemVersion.plist' (I think that's the name of the file). But my question is if the files I've got in my Macbook 10.5.8 (all the files, photos, applications, music, programmes... definitely EVERYTHING) are compatible with the new OS X Lion. Is that true? Are there any problems with that?
I know the better way to do it, is to create an USB or a DVD with the OS X Lion Installer, then to restore the computer (delete everything), and start the computer pressing Alt and selecting the USB where you have the Lion.