Apple macOS in a boxed physical form, so it’s up to users to create their own USB-based installers. Thankfully, this process can be accomplished with just a single Terminal command. Here’s how to create a USB installer for macOS Sierra. Step 1: Download macOS Sierra from the Mac App Store To create a USB installer for macOS Sierra, you first need to download the installation application from the. Using a, simply launch the App Store, find Sierra from the homepage sidebar, and download the installer. Once it has completed the download, the Sierra installer will automatically launch. Quit the install application, as this is meant for users who wish to upgrade their Macs to Sierra, not create a USB installer. Create Bootable USB Installer for Mac OSX Using TransMac. To create bootable USB installer for Mac in order to Install Mac OS X El Capitan on Windows, on Mac or on VirtualBox, you have to create bootable USB flash drive. Let’s get started that how to do it. First, you have to download TransMac software for Windows and install it on. In either case, once the installer opens, quit it without continuing the installation. Creating a Bootable USB Using Terminal. Terminal is the easiest way to create your bootable USB drive. You can quit the installer application by using the keyboard shortcut Command-Q. Step 2: Prepare the USB Drive To create a macOS Sierra USB installer, you’ll need a with a capacity of at least 8GB. The process of creating the USB installer deletes all data on the USB drive, so make sure it doesn’t contain any important files. With your USB drive connected to your Mac, launch the Disk Utility app. You can find Disk Utility by searching for it in or in Applications > Utilities. In Disk Utility, select your USB drive from the list on the left. Next, click Erase from the toolbar. We need to give the USB installer a temporary name in order for the Terminal command below to work. If you plan to just copy and paste the Terminal command, name your USB drive “Sierra.” You’re free to change it, but you’ll need to modify the command to reference the new name. That said, for a daily exchange of files (for example, if you work on a PC but you have a Mac at home), it’s a practical and effective solution. • It doesn’t let you set access permissions to files, so it’s potentially less secure than the NTFS format (the native OS X format). • It’s less efficient in terms of space management. In practice, for the same total size, you can put fewer files on a FAT32 formatted disk compared to a NTFS formatted disk. There are, however, some things you should know about the FAT32 format: • It doesn’t support files larger than 4 GB. What format for usb to work on both mac and windows computers. Make sure that Format is set to OS X Extended (Journaled) and Scheme is set to GUID Partition Map. Finally, click Erase to complete the process. Step 3: Create the macOS Sierra USB Installer With your USB drive ready, launch Terminal. As with Disk Utility, you can find Terminal via Spotlight or in Applications > Utilities. Copy and paste the following command into the Terminal window: sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Sierra --applicationpath /Applications/Install macOS Sierra.app --nointeraction This is a command, so you’ll need to enter your admin password when prompted. Terminal will then access the createinstallmedia tool built in to the Sierra installation bundle. You can monitor the progress of the process via the Terminal window. The time it takes to complete will vary depending on the speed and type of your USB drive, but shouldn’t be more than 5 minutes or so. Just be sure to let the command run uninterrupted until you see it report “Done,” at which point you can quit Terminal. At the end of the process, your new macOS Sierra USB installer will mount to your Mac’s desktop and will be ready for use. Step 4: Install macOS Sierra via USB Once you have your macOS Sierra USB installer, you can use it to install Sierra on compatible Macs in one of two ways. ![]() First, you can connect it to a running Mac and launch the upgrade installer. This will produce the same result as upgrading via the Mac App Store, but it saves you from having to download the Sierra installer application first. Second, you can use your USB drive to perform a clean install of Sierra. To do so, first power off the Mac you wish to upgrade and plug in your USB drive. Next, hit the Mac’s power button to turn it on and then press and hold the Alt/Option key on your keyboard as soon as you hear the Mac’s. Keep holding Alt/Option until you see the boot menu appear. Use the cursor or the arrow keys on your keyboard to select your Sierra USB installer. The Mac will now boot to the Sierra installer and, because it is running off of the USB drive, it can access and erase your Mac’s internal drive. Once erased, the installer will perform a clean install of Sierra on your drive (just make sure to back up before performing a clean install!). Want news and tips from TekRevue delivered directly to your inbox? Sign up for the TekRevue Weekly Digest using the box below. Get tips, reviews, news, and giveaways reserved exclusively for subscribers. Image via Before You Start The obvious first step here is to. But before you do anything else, a word of caution: once you've used the OS X installer, it will automatically delete the file you need to make the backup disk, so you'll want to either make a copy of the installer or create your disk before you upgrade. You can use a USB flash drive, external hard drive, or DVD-R disc, but the USB drive is quicker. If you're using a USB drive, it has to be formatted as 'Mac OS Extended (Journaled)' and set to partition type 'GUID Partition Table' in order to work. Image via Once inside, browse to the ' Contents > SharedSupport' folder where there will be a file called ' InstallESD.dmg.' This is the image file that contains the information you need to create the backup disk.
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