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How to download and install macOS Sierra beta right now

Karen Haslam | July 8, 2016
We show you how to prepare for and download macOS Sierra beta right now. Developer Preview and Public Beta now available

How to dual boot the OS X El Capitan beta on a Mac

If you don't have a spare external hard drive (or the one you have is slower than you would like) you can partition the main hard drive into two separate drives and then install macOS Sierra  on one and OS X 10.11 El Capitan on the other.

The only issue with partitioning your drive is that you will have to wipe your internal hard drive and reinstall OS X 10.11 El Capitan along with the new beta version.

If you want to keep any of your current work, you need to create a backup of Mac OS X 10.11 El Capitan and ensure that it will fit on your smaller partitioned drive.

To create your partition follow these instructions:

  • Boot Mac OS X into recovery mode (Hold down Option during startup)
  • Use Disk Utility in recovery mode to wipe the main hard drive and split it into two partitions.
  • Use the Install option in Recovery to install OS X 10.11 El Capitan onto the main partition.
  • Next restore the data to Yosemite from your Time Machine (or other backup)
  • Follow the steps above to install the macOS Sierra Preview onto the second partition.

Source: Macworld

 

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