Create a bootable Lion install drive for newer Macs

2. Drag the InstallESD.dmg icon into the Source field on the right.

3. Connect to your Mac the hard drive or flash drive you want to use for your bootable Lion installer. As with the drive used to download the installer, this drive must be at least 5GB in size (an 8GB flash drive works well) and it must be formatted with a GUID Partition Table.

4. In Disk Utility, find this destination drive in the sidebar and then drag it into the Destination field on the right; if the destination drive has multiple partitions, just drag the partition you want to use as your bootable installer volume. Warning: The next step will erase the destination drive or partition, so make sure it doesn't contain any valuable data.

5. Click Restore and, if prompted, enter an admin-level username and password.

To create a bootable DVD