When OS X Mavericks was released we conducted a tutorial to perform the installation of the operating system from scratch and for OS X Yosemite it will not be less. While it is true that updates can be done without formatting the Mac and absolutely nothing happens, some users prefer to carry out a clean installation of the new OS X and this is what we are going to see in this small tutorial.
Apple makes it easy with the installer to carry out the installation of OS X, but if we want to perform a clean installation of OS X we have to be clear that everything we have on the Mac is going to be eliminated and therefore it is very important to carry out a backup of all our important documents and data, so as not to lose anything (it is best to follow a protocol before, watch this tutorial). The backup is always positive to do it in updates or clean installations.
Well, once the steps prior to the installation have been carried out, the next thing to do is to start downloading DiskMaker and once we have it on the Mac we leave it in the downloads folder and continue with OS X Yosemite 10.10. While it is true that there are different ways to carry out this task we are going to use DiskMaker to perform the clean install of the new OS X Yosemite.
DiskMakerX
Once we have DiskMaker saved on the Mac and the download of OS X Yosemite 10.10 we can start the process. The current DiskMaker version is the one used for the Yosemite betas but it works the same for this final version. Now we can create our installer in a very simple way by following the following steps.
Now we connect to the Mac the USB or SD card of 8 GB or more to continue with the installation. This USB / SD will be permanently erased so it better be empty to avoid problems later. We start DiskMaker and click on the option install OS X Yosemite that we have previously downloaded to our Mac (in the applications folder) then it will ask us for the administrator password, we enter it and click on continue.
Now we have to wait for the process to finish and if it takes a little quiet, it is normal. In no case close the program, disconnect the USB / SD or turn off the computer before it finishes. Once finished we can start the installation process on our machine.
Install OS X Yosemite on your Mac
Now comes the simple. What we have to do is turn off our Mac with USB / SD connected to Mac and when we restart the machine we press the Alt key To bring up the start menu, we select the USB memory or SD card where we have the OS X Yosemite installer and press.
EYE! To install from scratch, touch erase current OS X first that we have installed and for this We select the Disk Utility option and delete our partition from the current OS X or partitions that we want. Now we just have to exit Disk Utility and begin the installation of OS X Yosemite with the steps that they are indicating.
And that's it!
The question here is the usual one Is it worth doing a clean install on my Mac? Well, that depends on each user, for example I am always testing Apps and others on the Mac, so I follow the tutorial in each new OS X, but if your Mac is relatively new and you have no operating problems or major failures in it, It is not necessary to carry out the 'format' update directly with the installer and that's it.
We are always on time to carry out a clean installation of OS X so if in the future you have problems with the Mac or want to sell your machine you can always carry out this possibility.