Note: 5400 RPM version got transfer rates up to 100MB/sec. G-Technology G-DRIVE mobile USB, 1TB, Portasble USB 3.0 Drive, 7200 RPM (transfer rates up to 136MB/sec) External Drive (0G02874).5 GB), Apple states in the support document ‘ OS X: Installing OS X on an external volume‘ that “ the storage device must have at least 13 GB available (after formatting) to install OS X Lion or later and a Recovery partition“. For details about the high-speed I/O performance see Apple’s Thunderbolt page.Īlthough the OS X installers are much smaller (approx. With USB 2.0 the speed (up t0 0.25 Gb/sec) is significantly slower, the experience on USB 1.0 is unacceptable. However, the best choice is an external drive connected via USB 3.0 (up to 5 Gb/sec), Thunderbolt (up to 10 Gb/s) or Thunderbolt 2 (up to 20 Gb/sec) due to transfer speed reasons.

The installation of Mac OS X 10.11 El Capitan on an external hard drive works on a SD Card, USB flash drive, USB drive or any other external hard drive connected via USB 2.0, USB 3.0, FireWire or Thunderbolt. How to install OS X 10.11 El Capitan on external drive 1.

Download and install os x el capitan