Create OS X Installer on USB from Internet Recovery


If you have bought a Mac recently you will have seen how to unpack it already gray recovery DVDs not includedRather, Apple has decided that if you have a problem with the system, it is best to recover it through Time Machine when starting the Mac or by downloading the complete system again from its servers from the recovery online.

The problem is that having the system pre-installed and not be a commercial version downloaded from the Mac App Store, we will not be given the option to download it again from the store to create the USB if we are experiencing problems, since it will not appear as purchased for that purpose.

For those of you who have decent internet connections either by fiber or by ADSL, it is not too tedious to start the Mac, press and hold CMD + R and follow the instructions to wait for everything to download and install it every time you have problems repeating the process. However, there are still users with poor connections or at least not so fast and that every time they want to completely reinstall the system, it will become a nightmare to have to wait to have everything downloaded.

With this we are going to implement this little trick that will make the installation image It is downloaded to a pendrive of at least 8Gb capacity. The first thing would be to connect the aforementioned pendrive to the Mac, restart the computer and start the recovery mode by pressing CMD + R when it boots. Once inside this mode, we will select the option to install OS X and as the destination drive the USB, we will let it download and once it has done so the Mac will restart, when it does we will have more or less 2 seconds in which to it will show a black screen before booting, just at that moment we will disconnect the USB before it boots completely.

Once we are inside the system we will reconnect the pendrive and we will verify that a file called InstallESD.dmg, if we do not have it, it is that we disconnected the USB late. If we have it, we just have to dump the content of the image on the USB with a program like LiondiskMaker that we already talked about a while ago, or follow the instructions that we leave you also in this post, where my partner Pedro explained the same process but downloading the system from the App Store, that is, as if we had bought it. With that we will always have a USB with the OS X installer ready for when we need it without having to go through the internet download ring every time we want to reinstall.

More information - Bootable pendrive with OS X Mountain Lion

Source - Cnet

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