How To Create Rescue Usb For Mac Ios X

Advertisement As you may know, you can reinstall macOS on your computer via the internet recovery. But did you know that you can create a bootable USB drive to install macOS from? This will let you boot your Mac from a different source if it won’t work normally, and makes installs on multiple machines easy. Let’s see how to do this. Choosing a USB Flash Drive for Installing Mac USB flash drives are cheaper than ever, so you won’t have to spend much for this task.

However, make sure to buy a name-brand flash drive (like SanDisk, Kingston, or PNY) from a reputable store. Stay away from super-cheap drives with suspiciously high storage on sites like eBay. These drives have their firmware hacked to report a false size to your operating system. Not only will the transfer speeds be painfully slow, but using them may also result in loss of data or even a damaged USB port.

Also, check to see what ports you have on your Mac. The 12″ MacBook has a single USB-C port, while MacBook Pro models from 2016 and later feature USB-C ports exclusively.

Apple released the new Mac OS X 10.10 Yosemite in the Mac App Store for everyone to download and install for free on October 16th, 2014, but downloading a 5+ GB file for each of your computers will take some serious time. The best thing to do is download it once and create a bootable install USB.

Fortunately, there are USB-C drives available, or you can use a USB-C to USB-A adapter. It’s best to go with a USB 3.0 drive, with a minimum size of 16GB. The is good overall value for the money; we’ve highlighted for more options. $9.99 Formatting Your USB Flash Drive You can only create a bootable installer for macOS on a Mac. If you’re using a flash drive that already has data on it, make sure to back up any important files as you’re going to erase everything in a moment. Navigate to Applications > Utilities, and open up Disk Utility. You should see your flash drive under the External section in the left pane.

After selecting it, click on the Erase button along the top. Choose a friendly name (which you’ll use later), and make sure to choose Mac OS Extended (Journaled) for the format. Finally, click Erase and you’re done with this step. Downloading the macOS Installer To download the macOS installer, open the App Store and search for your version of macOS. Click on the Download button if you’re on High Sierra or earlier. MacOS Mojave is slightly different, as it opens up your System Preferences to download the installer.

This is because one of is a new way of installing updates.

The idea behind a macOS Clean Install When you install a new major version of OS X, or after some time has passed, it is a good idea to do a clean install (that is, to erase the disk you are installing OS X onto as part of the installation process). That will make your Mac run blazingly fast for a few months or more, and many people report that it fixes longstanding problems they’ve had too. It used to be common practice to occasionally run a clean install, and then manually migrate all the files and settings over in order to get a completely fresh start. However, it has been shown in recent times that in the vast majority of cases if you simply run a clean install, then duplicate your old home folder to your new disk, you will get all of the same advantages as a clean install followed by manual migration, with a small fraction of the effort.

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