How to install OS X Yosemite in addition to Mavericks

after the presentation, OS X YosemiteI, like many other users, set a goal to try new person. Naturally, to install the system as the core was scary to say the least. But after some time, he caught the eye article, Which was set out in detail the division of space without the use of third-party tools, drives / flash drives and most importantly, preserving the health of two of operating systems.

This way I've tested it on my iMac. Everything works as it should, at least on the web and have been horror stories about the "fall" of both systems after the installation. Maybe these people are doing something wrong.

Despite the personal experience, I recommend making a backup copy of OS X, or even transfer all the necessary files on a flash drive. Do not rely on "maybe blow over."

So, to begin, check if your system supports OS X Yosemite in our article. For the sake of decency, I note that it is better not even think about installing a hard disk of your Mac is less than 256 GB. The system requires a minimum of 15 GB, but it is better to allocate at least 20-30. Here everything depends exclusively in the presence of free memory.

Then, you can proceed to download the operating system in the Developer Center, if you're a developer, or on any torrent if a normal user. Follow the instructions carefully.

If someone is too lazy to read the description of the picture, you see the video of the installation of the original English voice acting.

Step 1: Partitioning

Open the built-in application "Disk Utility". In it, select your hard drive in the left pane, and then open the menu "disk partition".

Here you need to click on the "+" under the menu "Partition Scheme." After that, the disc will break into two equal parts.

Open the new section and call it OS X 10.10, then specify the desired size and then click "Apply".

Wait for the completion of the operation.

Step 2: Installation

Unpack the DMG-file OS X 10.10 double tapom left mouse button.

After this transfer, the files in the "Programs" and open it.

Further agree with all terms and conditions.

When the selection of the disc will appear, click "show all drives" and select the created in the first step.

Enter your password and wait for the system installation is completed.

Step 3: Switching between the systems

Installing OS X 10.10, you have doomed themselves to some disruption caused by the need to reboot to switch between systems.

To do this, there are two ways:

1. At the time of incorporation or restart OSes, press the Option key (⌥) on the keyboard. In order to engage the certain, I Tapan on it many times as long as the option of downloading the disk will appear.
2. Open the "System Settings" and choose "Startup Disk". Select the desired drive and click the "reset"

I would recommend that you only use the second method. Sometimes Option works in a strange way, because of what OS X 10.9 supposedly lost. In fact, do not panic, by choosing Restore. Just boot the active system, and use the second method.

If you have any questions about installation or suggestions to supplement the article - write in the comments.