Installing a new operating system over the onetime ane can create problems with stability. Apple disregarded these concerns with the release of Mac OS 10 10.seven King of beasts by but allowing the initial release in the Mac App Store for download. A USB Flash drive version will become bachelor in the future, but in that location is a way to get a clean install from a DVD or USB Flash Drive at present with some endeavour.

Nosotros will testify y'all how to create your own installation DVD or USB Flash Drive. For now those are your merely two options since Macs won't kick from an SD card. In the case of the Flash Bulldoze we volition also show you how to put 2 partitions on one 8GB or larger flash drive so that you volition also accept all your Mac apps on the bulldoze ready to install after y'all install the Os.

OS X Lion

Why Make an Install Disk

Why would someone want to create an install deejay instead of install Lion on pinnacle of their sometime Bone X installation the manner Apple tree wants? While it seems to work well in our experience, hither are a few reasons to go through the problem:

  • Make clean install of an Os is usually more stable
  • Forces user to articulate out one-time file and app clutter that is not used anymore saving drive infinite
  • A future difficult bulldoze crash might leave you unable to install from the Mac App Store or the new Lion Recovery feature
  • Your are a geek and trying technical stuff on a computer is fun

While the first two and last option are proficient reasons, the third is the most important. This is a fill-in programme and so you don't have to have your calculator to Apple to ready it if the hard drive or SSD drive won't kicking anymore. A clean install ordinarily fixes these kinds of issues.

What You Demand

In order to practise this you will demand the OS X Lion installation file. If you already upgraded to Lion the install image is deleted by default and it is already as well late. Some other sites take posted that yous can re-download the file. But the only mode to do that is on a organisation that doesn't already take Lion installed. The just way to practice this is to utilize your computer's restore disk to reinstall Snow Leopard or an earlier version of OS X. Do this before y'all install Lion only after you lot download it from the Mac App Shop.

You will demand a USB wink drive of at least 5GB. Nosotros tried this with a 4GB drive and Disk Utility would not burn down the Lion install image saying information technology was too small.

We chose a 16GB bulldoze instead and created ii partitions on it, ane for King of beasts and i for our downloaded, non-Mac App Shop apps. That fashion y'all have a single disk to restore your Bone and your apps. Dorsum those app files up though in case you lose your flash drive.

How to Create the Disk

  1. Download King of beasts from the Mac App Store only don't install it nonetheless
  2. Open the Applications folder and right-click on the Panthera leo installer
  3. Click Show Package Contents and find the InstallESD.dmg image file in the Contents, SharedSupport folder
  4. Open Disk Utility in OS X and insert your Wink drive
  5. Either open the paradigm file from the File menu or drag information technology from a Finder window into the Disk Utility'south left hand columnDisk Utility
  6. For DVD insert your DVD and select the deejay paradigm and click the Burn push and when it is finished skip to step sixteen
  7. For Flash Drive click on the bulldoze listed in the left hand column of Disk Utility andselect the Partition tab
  8. For 2 partitions like we did, then nether Partition Layout: choose 2 Partitions
  9. For 1 partition making the whole USB drive an install dive under Partitioning Layout: choose one Partition
  10. If yous want ii partitions, then below the Partition Layout drop downward is a visual representation of your layout – elevate the slider up or downward till it shows about 5GB or enter it manually in the Size box to the right – annotation: the King of beasts image file is well-nigh 4GB just needs room to expand
  11. Give each partition a proper name and choose Mac OS Extended (Journaled)
  12. Click Use
  13. Later previous step finished cull the Restore tab and in the Source box drag the Lion install image from the left hand window
  14. Elevate the USB partition y'all ready upwardly in step ix to the Destination box and click Restore to make it burn down the Lion prototype
  15. When complete put all the app files you desire to install on the non-Lion install segmentation of the flash disk
  16. Insert the Flash Drive or DVD drive into the Mac you wish to install Lion on
  17. Boot the machine holding down the option key
  18. Choose Mac Bone X Install ESD from the optional disk to boot from when they appear – note the end of the deejay name is cut off on some monitors
  19. Follow the installation instructions on-screen
  20. Reboot when it is finished and now yous tin install your apps from the Flash Bulldoze if y'all created ane

Be sure to save this USB drive and equally we said before brand sure you have a backup of the downloaded apps on the second sectionalisation, if you lot become that road.