OSX 10.11 El Caption USB Installation Disk production method official online: HTTPS://DEVELOPER.APPLE.COM/OSX/DOWNLOAD/1. Use the disk utility to erase the USB disk or create a partition with a partition size of at least 8GB called "Caption" in the format "Mac OS extension (Day formal)" 2. Assuming you download the installation file, in the/applications directory, execute the following command: $ sudo/applications/install\ os\ x\ 10.11\ developer\ beta.app/contents/ Resources/createinstallmedia--volume/volumes/capitan--applicationpath/applications/install\ OS\ X\ 10.11\ Developer\ Beta.app--nointeraction Show results: password:erasing disk:0% ... 10% ... 20% ... 30% ... 100% ... Copying installer files to disk ... Copy complete. Making Disk Bootable ... Copying boot files ... Copy complete. Done. Production completed.
OSX 10.11 El Caption USB installation disc making method