10.11 was another stability release, running much smoother than they buggy 10.10. 10.10 introduced a UI overhaul, changing the 3d look of OSX to the flat look if iOS, and introducing even more integration with iOS devices. 10.9 was the first free version of OSX, and was a minor upgrade from 10.8, introducing more iOS and iCloud integration. 10.8 was another stability release, the most notable new feature being the addition of iMessage. 10.7 is where more iOS features begin showing up in OS X, such as launchpad and multitouch gestures. 10.7 introduced a new spaces design, as well as some UI redesigns with different button icons, and smaller traffic lights.

10.6 was notable for cutting of PowerPC Macs. 10.6 was a stability release, improving on 10.5, and not really adding any new features. 10.5 brought on a more 3d glassy look, and introduced features such as spaces and a reworked Finder. OS X started getting sophisticated around 10.3, when a more complete finder interface was added and overall system stability improved. 10.0-10.2 were fairly primitive operating systems, pretty much a beta. With its “Junk Files” feature, it not only cleans temporary files including logs, mail caches, iTunes, and iOS temporary files, and empties trash for the current user, but also detects remaining files after deleting apps.Kinda hard to sum it briefly, as OS X has been going for almost 20 years now. It’s really great to have such a system optimizing tool. I must tell you there is a savior for your Mac – Cleaner One Pro. There are also probably many apps you have never used and don’t need anymore. Let’s say someday your Mac has a lot of junk files and duplicate photos. I believe you also want to keep your Mac clean. If you have done a complete installation of macOS, you must be enjoying the completely new macOS now. Click “Install” and wait until the upgrade is done

Agree to the software terms and conditions. When the installation window appears, click “Continue” again. When it returns to the former page, insert your USB and click “Continue”. Select “Mac OS Extended (Journaled)” from the list of volume formats and start formatting.į. Open “Disk Utility”, choose your startup disk, and then click “Erase”.Į. Press and hold “Command+R” when you hear a startup ring (or when the screen on your newer Mac device turns black), and hold down the keys until your computer restarts.ĭ.

El capitan vs sierra os