Content of the material
Solving the desktop OS
The core problem both 2014's OS X Yosemite and this year's OS X El Capitan release have been trying to resolve is how to enable the desktop OS to grow alongside iOS, without losing what has made it so delightful to use for more than a decade. Last year introduced Handoff, for instance, a method for continuing work and tasks on your desktop which you started on iOS. It also brought SMS messaging, iCloud Drive and Airdrop among other features to make it easier to justify owning both a Mac and an iPhone or iPad.
With El Capitan the task is slightly different: improving the core elements of OS X to be simpler and more explicable compared to the single (or split) screen zen of iOS. And in the main it's a huge win: as with all recent OS X updates, this is a free upgrade, and installing it is a total no-brainer. What's not clear yet is to what extent it paves a path to relevance for OS X in 2020.
It's fair to say the big features in OS X El Capitan are resolutely unexciting to list, but tremendously powerful in practice.
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Installing from scratch
First and foremost, I want to reiterate how important it is to perform a Time Machine backup before you do this. Again, backup your Mac before proceeding. If you wish to install from scratch, it involves erasing your current installation. Unless you want to go in and manually reconfigure everything, which some people like me prefer to do, you should backup using Time Machine so that you can restore your data at the end of the process.
That said, the whole point of using this method instead of the upgrade method mention above is to have a clean slate, and in that case, you may not care about restoring from backup. Still, it’s always a good idea to at least have a backup available, even if you don’t plan on actually using it.
As I mentioned in the preparation guide, it’s possible to install OS X from scratch. Doing this is more time consuming that it would be to just perform an upgrade. It also requires a bit more technical skill. All in all, however, it’s not too difficult.
The first thing you’ll want to do is create a USB Installer. Once you do that, it’s just a matter of powering off your Mac, and powering it back up while holding the Option key with the USB Installer inserted.
You will then be shown the option to boot from the USB Installer, which you should do. Once you do that, open Disk Utility from the menu bar, select your primary disk where your current version of OS X resides, and erase the disk using the options under the Erase tab.
From there, it’s just a matter of exiting Disk Utility, and proceeding through the OS X El Capitan installation, which should be on screen. The installer will walk your though the entire process step by step.
Part 3. El Capitan vs Sierra: Comparison Of Performance
The El Capitan works with fine especially when you have more than enough disk space that is about 10% or higher. On the other hand, the macOS Sierra runs better and faster on new Mac devices. Plus, it looks snappier maybe because it’s a new system that appears cleaner.
The battery life of OS X El Capitan is approximately 6 to 7 hours on a MacBook Air bought in 2013. However, it has a shorter lifespan on macOS Sierra (for the same device). This is at 5 to 6 hours of battery life. Although, this is a usual trend that happens when you upgrade your OS X.
When it comes to security, El Capitan is already solid. However, macOS Sierra does it better with 65 security fixes.
When it comes to performance, thinking about which is more powerful or faster, it’s difficult to judge both versions. However, a new system might be snappier and have faster responses. This can be due to the fact that it’s a new version and the faster response might be lost in a year or two. Let’s talk about system requirements then.
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Although El Capitan is essentially a solid win, its lack of imaginative momentum — just as the iPad Pro rounds into existence — undermines the argument Apple has always made that Macs and iPads exist for two different purposes, and two different users. The iPad Pro is a large screen, powerful mobile device for productivity-minded people with a rich ecosystem of apps and developers, and all-day battery life. The new Macbook is a large screen, powerful mobile device for… well, you get the idea.
Apple would have it that iOS and OS X are harmonising. But El Capitan's constant struggle to plug the leaks in the desktop, combined with a desire to speak the language of iOS, makes it feel as though they are colliding instead. And its iOS that has the wind at its back.
Mac OS X will be available for compatible Macs from 30 September 2015, via the Mac App Store.