How To Dual-Boot OS X Yosemite with OS X Mavericks [Instructions]

Many Mac users would not mind the opportunity to test OS X Yosemite. Configuring your computer to dual-boot two operating systems – the main Mavericks and the test – Yosemite is currently the most convenient and safe option to try out the system.

Dual booting means that the computer has two operating systems installed, and at the startup the user selects one of them. OS X 10.10 Yosemite will operate independently from the main system OS X 10.9 (or even 10.8, 10.7 or 10.6, if you have an older Mac) with its own parameters and installed programs.

It is easy to organize access to OS X Yosemite under this scheme. You just need to prepare a special partition on the hard disk, and then install the operating system. Be sure to make a backup copy of the data before proceeding to the breakdown of the hard drive into sections.
Setting up OS X Yosemite and OS X Mavericks dual-boot:

Step 1: Download the image of the OS X Yosemite operating system. This can be done using the free online registration with Apple.

Wait until the download is complete, the image of the OS X Yosemite developer build takes 5.09 GB.

Step 2: Open Disk Utility from the Applications folder -> Utilities.

Step 3: Select the main Mac hard drive from the sidebar, and then click the disk partition.

Step 3: Click the “+” next to the partition. Allocate the new OS at least 15 GB and name the new partition OS X Yosemite. Click Apply.

Step 4: After completing the operation close the Disk Utility, and then run the installation file «Install OS X 10.10 Developer Preview» from the Applications folder.

Step 5: In the setup menu, choose the OS X Yosemite as the main drive (you have to use the “Show all drives” command to see the partition).

Mac will install OS X Yosemite and launch the new operating system. To reload your main operating system, restart the computer while holding Option (Alt), and select OS X Mavericks in the boot menu.

Source: macdigger.ru

Images: Redmond Pie