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El Capitan is still in BETA phase, but that doesn’t mean you can’t install it and test it out on your Mac device. However, you should keep in mind that since this OS version is currently in BETA phase, there are high chances that you will encounter bugs and other annoying issues.

The installation process is very easy, but if you don’t follow the right steps, you will mess it up and lose your personal files. Today we’re going to give you a step-by-step guide so that you can install OS X 10.11 El Capitan on your Mac device without any problems.

First of all, you will need to create a bootable installation USB drive. We remind you that the OS can be installed directly from within the OS, by using the installer, but a bootable USB device will be very useful if you want to install the new OS on multiple Macs.

HINT: In order to be sure that you don’t lose any important files, we suggest you to create a system backup using Apple’s Time Capsule.


– An 8GB USB Flash Drive formatted as a Mac OS Extended (Journaled) volume named “Install”
– El Capitan Installer (you can download it from Mac App Store)
– A Mac device.


In order to install the new OS without deleting your file, you will need to create a separate data partition for the El Capitan OS. To do this, press the command key + space in order to bring the Spotlight search. Here you will need to type “Disk Utility” and open it. Now, select Macintosh HD hard drive from the left panel and navigate to the “Partition” tab.

In order to create another data partition, click on the “+” symbol and you will be asked to give a name for the new partition. The new partition should have 20GB, which will be enough for the new OS, but keep in mind that you can make it bigger than that.

HINT: The new partition needs to have at least 20GB – this is the minimum size required for the installation of the El Capitan OS.

Finally, click on the “Apply” and the partition will be created. This process might take a few minutes, but once it’s done, the new partition will be seen in “Finder”.

Creating The El Capitan OS Bootable USB Drive

First of all, connect the format USB drive to your Mac device. You will need to download the El Capitan application and install it on your system. The default storage location is the Applications folder.

Launch the “Terminal” from Applications and use the following commands to download and install El Capitan application:

sudo /Applications/Install OS X El Capitan GM –volume /Volumes/ElCapInstaller –applicationpath /Applications/Install OS X El Capitan GM –nointeraction

When asked for your password, enter it and press the “Return” button. Next, a message will say that in order to continue, it will need to delete the disk at /Volumes/Untitled. When this message appears, you will need to press “Y” and after that “Return”.

The terminal window will show the progress of the bootable media creation and when it’s done, the USB flash drive will be named “Install OS X El Capitan GM”.

Booting From The USB Drive And Installing El Capitan GM

Now, you will need to connect the El Capitan OS Bootable USB Drive on your Mac device and boot on it. There are two ways to boot using the USB Drive. If you are using OS X go to System->Preferences->Startup Disk Utility. Here you will need to select the bootable media as the startup device and restart your system.

Another way to do this on a Mac device is to shut it down and press the “Power” button while holding the “Option” key until the “Startup Manager” appears. When “Startup Manager” appears, you will be able to select the USB Drive and press “Enter”.

After you’ve successfully booted into the installer, you will be able to install the El Capitan GM in a dual boot configuration. Just follow the instructions and make sure that you select the installation driver that you’ve created earlier as the install destination.