1/ Use Quick Look in macOS Sierra — Use Quick Look in macOS Sierra (and previous versions of macOS) to view photos, files, movies, sound files, PDFs, even Word files when you don’t have Word, without opening them – the view is in full resolution. You can use Quick Look for items in Finder windows, on your desktop, in emails, in messages, and other places. Select one or more items, then press the Spacebar on your keyboard or, with later apple trackpads, force-click items. A Quick Look window opens. If you selected multiple items, the first item is shown. You can manually enlarge the window by dragging its corners, click the Full Screen green button at top left, and to return to the previous size, click the Exit Full Screen button (that green button again).
To see the next or previous item, click the arrows on the left, or press the Left and Right arrow keys. In full screen, you can click Play to view multiple items as a slideshow.
To see the items in an index sheet view, click the Sheet View button on the left, or press Command-Return.
You can also open the file with its parent Application, which is listed at top right, to actually edit the file (in the example above, it’s the Preview app) and click the Share button on the right.
When you’re done, close the Quick Look window by pressing the Spacebar or force-clicking again, or click the Close button (red button at top left of the window).
2/ Play the video portion of a Live Photo — When you open a Live Photo (which you can only take with iPhone 6s or 7) in the Quick Look window, the video portion of the photo plays automatically. To view it again, click Live Photo in the bottom-left corner of the photo.
3/ Create and modify a Smart Folder — Smart Folders automatically gather files by type and subject matter. They’re updated as you change, add, and remove files on your Mac.
In the Finder, choose File>New Smart Folder. To search for files, enter a topic, a phrase, or another parameter in the search field.
To determine whether the search should include only the names of files or their entire contents, choose ‘Name matches’ in the search suggestions that appear below the search field, then click Name, then choose either Filename or Everything.
To search for additional specific attributes, click the Add buttonbelow the search field, then make choices using the search attribute pop-up menus that appear.
The menus work in pairs; for example, to search for images, you choose Kind from the pop-up menu on the left, then choose Images from the pop-up menu next to it.
Click Save, then specify a name and location for your Smart Folder.
If you don’t want your Smart Folder to be in the sidebar, deselect Add To Sidebar.
You can’t use certain characters, including punctuation such as a colon (:), in folder names. If an error message appears, try using another name.
To change the criteria for a Smart Folder, open the Smart Folder. Begin typing in the folder’s search field, or click the Action pop-up menu , then choose Show Search Criteria.
4/ History in Safari — Want to see the sites you were looking at on your Mac yesterday? Easy. From the History menu, you can choose Earlier Today, or any of the six days preceding that.
Of course, this poses a security concern: anyone else can do the same thing on your Mac if it’s unlocked, to see where you were and to open any of those links – you’re bank account, for example, and if you let this automatically log in (a very bad idea), then you’re really asking for trouble. When you select the Clear History item at the bottom of the History menu, you get to choose just to delete the last hour’s sites, Today, Today and Yesterday or All. Be warned that any logins and auto-logins you went to will also be ‘forgotten’ and you will have to enter your details and/or auto- log in again.
5/ Selectively delete history items — I had never realised you can much more selectively delete history items. When you choose Show All History, which is the very top item in the History menu, you get to click on any one item (or hold down the Command key on your keyboard to select several items) to highlight individual sites and press the Delete key on your keyboard.
You can clear everything with the Clear History …’ button and even search for that distant item.
Double-clicking on any line launches the site, which can also be very handy.