But to install or reinstall a recent version of OS X, you must either download a non-bootable installer from the Mac App Store or (via OS X’s invisible, bootable recovery partition) download 6GB of installer data from Apple’s servers during the installation process. The first two options on the list require simply following instructions in the tool, and you won't need to deal with an ISO file at all.When OS X shipped on a DVD a good number of years ago, you always had the convenience of a bootable installer—an OS X installer that could be used to boot your Mac if its own drive was having problems. Download a Windows 10 ISO file to your computer. Create a Windows 10 bootable USB stick. However, unlike with other Mac App Store-purchased software, the Mac App.
![]() ![]() ![]() Make Usb Bootable Windows Windows 10 ISO FileNote that the window that displays the command scrolls to the right.Sudo /Applications/Install OS X El Capitan.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install OS X El Capitan.app Select the text of the following Terminal command and copy it. Make sure the El Capitan installer (or at least a copy of it), called Install OS X El Capitan.app, is in its default location in your main Applications folder (/Applications). If the drive isn’t named Untitled, the procedure won’t work.) (The Terminal commands I provide here assume that the drive is named Untitled. Connect to your Mac a properly formatted 8GB (or larger) drive, and rename the drive Untitled. If you wish to continue type (Y) then press return:” If so, type the letter Y and then press Return. You may see the message “To continue we need to erase the disk at /Volumes/Untitled. Type your admin-level account password when prompted, and then press Return. Paste the copied command into Terminal and press Return. Warning: This step will erase the destination drive or partition, so make sure that it doesn’t contain any valuable data. Done., as shown in the screenshot above, the process has finished.Createinstallmedia will have renamed your drive from Untitled to Install OS X El Capitan. Once you see Copy Complete. The procedure can take as little as a couple minutes, or as long as 20 to 30 minutes, depending on how fast your Mac can copy data to the destination drive. Making disk bootable… Copying boot files… Copy complete. You also see a list of the program’s tasks as they occur: Copying installer files to disk… Copy complete. When OS X’s Startup Manager appears, select the installer drive and then click the arrow below it to proceed with startup. Then, restart your Mac (or, if it’s currently shut down, start it up) while holding down the Option key. First, connect the drive to your Mac. Booting from the installer driveYou can boot any El Capitan-compatible Mac from your new installer drive. Install drivers for cac reader on a macIn fact, you’ll see the same OS X Utilities screen you get when you boot into OS X Recovery—but unlike with recovery mode, your bootable installer includes the entire installer. However, sometimes OS X installer drives don’t appear in the Startup Disk window.)Once booted from your installer drive, you can perform any of the tasks available from the OS X installer’s special recovery and restore features.
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