I unboxed I new MacBook Pro (13" variant) last night, charged it, took it downstairs and started setting it up. By default, Firevault encryption was ticked, and once set up it said it had paused because power was disconnected. This morning, I've started my research, and have various questions: 1. Are there any performance implications to the whole disk encryption (there certainly are on the corporate Dell from Hell, but that is ancient)? 2. How long should the encryption take on an out of the box MacBook pro (the only thing I've installed is Lightroom, so far)? 3. Is it easy enough to switch off at this stage (should I)? 4. A lot of the problems I'm reading about (not starting the encryption - staying paused, when the device is plugged in, for example) seem to relate to Yosemite. Is it more stable/reliable under El Capitan? If I simply plug my laptop in, and switch it on, before I go to work tomorrow morning, will I come home to a freshly encrypted MacBook?