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The name of the new version of Apple's desktop operating system follows the trend of naming after important places in the United States established in 2013 with OS X Mavericks. However, for the first time since 2001, the name of the entire system is changing – OS X becomes macOS. Welcome to macOS Sierra. The new name is a convergence with other Apple operating systems, which is confirmed by the news itself.

For quite some time now was speculated, that this change could come, and it was also associated with estimates of what it could bring in terms of system functionality. In the end, it turns out that the current system is either already too advanced for a really fundamental change, or, on the contrary, there are no technologies yet that would significantly advance it. However, this does not mean that macOS Sierra is just a new name.

Probably the most significant innovation actually refers to the first presentation of the Macintosh in 1984. At that time, the small computer introduced itself to the audience by voice. This is what macOS Sierra did too, through the voice of Siri, which thus appears for the first time on the desktop.

Its place is mainly in the upper system bar next to the Spotlight icon, but it can also be launched from the dock or Launcher (of course, it can also be activated by voice or keyboard shortcut). As for the functionality itself, Siri is very close to Spotlight, actually it differs only in that the user interacts with it by voice instead of the keyboard. In practice, however, this means that you don't have to take your eyes off what you're doing when, for example, you need to quickly find a file, send a message, book a place at a restaurant, call someone, or want to play an album or playlist. It's just as easy to find out how much space is left on your computer's disk or what time it is on the other side of the globe from Siri.

As soon as Siri displays the results of his work in the clear bar on the right side of the display, the user can quickly pull out what he needs again (for example, drag and drop an image from the Internet, a location into a calendar, a document into an e-mail, etc.) and concentrate on the original activity it is therefore only minimally disturbed. In addition, the results of the most frequent Siri searches can be quickly accessed in the macOS Notification Center. Unfortunately, even in the case of macOS, Siri does not understand Czech.

The second major new feature in macOS Sierra concerns a set of features called Continuity that improve collaboration between devices running different Apple operating systems. Apple Watch owners can get rid of the need to type a password every time they leave their computer or wake it up without sacrificing security. If they have an Apple Watch on their wrist, macOS Sierra will unlock itself. For iOS and Mac users, the universal mailbox is a significant novelty. If you copy something on a Mac, you can paste it in iOS and vice versa, and the same is true between Macs and iOS devices.

Furthermore, the panels known from web browsers, outside of Safari on the Mac, first appeared in the Finder in OS X Mavericks, and with macOS Sierra they are also coming to other system applications. These include Maps, Mail, Pages, Numbers, Keynote, TextEdit, and will also appear in third-party applications. The arrival of the "Picture in Picture" feature from iOS 9 on Mac also includes better organization of screen space. Some video playback applications have been able to run minimized in the foreground on Mac for a long time, but "Picture in Picture" will also allow videos from the Internet or iTunes to do the same.

Better organization of disk space will be helped by expanding the capabilities of iCloud Drive. The latter not only copies the "Documents" folder and desktop contents to the cloud for easy access from all devices, but also frees up disk space when it runs low. This means that infrequently used files can be automatically saved to iCloud Drive, or macOS Sierra will find files on the drive that have not been used for a long time and offer to delete them permanently.

Rather than user-created files, the permanent deletion offer will cover unnecessary app installers, temporary files, logs, duplicate files, etc. Sierra will also offer to automatically delete files from the recycle bin if they have been there for more than 30 days.

Straight from the new iOS 10 macOS Sierra will also feature a new way of automatically grouping photos and videos in the Photos app into so-called "Memories" and many new iMessage effects. The revamped user experience of the Apple Music streaming service was also introduced as part of iOS 10, but it also applies to Mac.

Finally, the arrival of Apple Pay on Mac is not very interesting news for the Czech Republic and Slovakia. When choosing to pay via Apple Pay on a computer, it will be enough to place your finger on the iPhone's Touch ID or press the side button of the Apple Watch on your hand for confirmation.

macOS Sierra is quite a long way from being a big event, and the transition from OS X El Capitan probably won't be accompanied by a major change in the way you use your computer for most users. However, it brings a non-negligible number of less prominent, but potentially very useful functions that contribute to the continued development of the operating system, which is probably not the main one for Apple at the moment, but still important.

A developer trial of macOS Sierra is available today, a public trial will be for program participants available from July and the public version will be released in the fall.

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