1/ Automatically select best account to send from in Mac Mail — Apple Mail received a new feature in Sierra that automatically chooses the best account for you to send a new message from, based on who your email is addressed to and what mailbox and message you had selected when you started composing.
To turn this on (or off) open Mail’s Preferences from the menus at the top. Use the Composing Tab in Mail Preferences to access your settings for sending messages. Under the Composing tab, you’ll see a drop-down next to “Send new messages from.” Pick that to view your options.
You might almost always want to send from your work email address, but if you want to try out letting Apple Mail pick for you, then toggle that drop-down to “Automatically select best account.”
2/ Enable Do Not Disturb in macOS to silence notifications — Notifications can be a mixed blessing. For some they keep the chaos of communications down and allow for rapid response to an email or a Tweet, but for others they can be an annoying distraction.
You can silence notifications until midnight quickly, with a single click. To get that done, option-click (hold down the Option key on your keyboard while you click) on the Notifications icon in the upper-right hand corner of the desktop.
To show that Notifications are muted, the icon becomes greyed out. When the icon is greyed, you can still invoke the Notifications tray by clicking on the icon again — but this won’t un-mute them.
To do so, either pop open the Notifications tray and turn them back on with the toggle, or option-click on the Notifications icon in the menubar again.
3/ Who can and can’t bother you — If you want more precise control over what gets to bother you, delve into the settings of the feature itself.
Select System Preferences from the apple Menu (or from the Dock). In the upper right hand corner of the system preferences, select Notifications. From this menu, most parameters of Notification Center are set. Setting the schedule for notifications to not bother you at all during working hours is a good solution for the easily distracted.
There are other settings here, such as the ability to turn them off when the the display is being mirrored for a presentation, or to allow for a particularly persistent caller to break though your need to not be disturbed.
However, another option to quiet the tumult is to tell the most frequent offender to not pop up a notification. Select whatever app you wish to silence from the left hand column, and turn it off, or pare down when it will yell at you.
4/ Set folders in the Notes app — There aren’t a lot of ways to organize notes in Apple Notes, which became so much more powerful in Yosemite. But you can set folders and subfolders – clock the Elis icon at lower left in the Notes window to create a folder. There’s no obvious way to create a subfolder, but in fact all you do is drag one folder into another.
Keep in mind that if you delete a folder, then all of the subfolders and notes will also be deleted.
(Unfortunately, it’s not possible to create subfolders in iOS Notes.But if you create your subfolders on macOS, and do sync over to iOS.)
5/ Text selection tricks — Clicking anywhere within text in a document places your cursor there for deleting or adding to what you’ve written. While you can click and drag to select text, sometimes this means you miss a few letters. If you want to just select one word, it’s much faster to double-click it.
A triple-click selects the entire paragraph your cursor is on.
More sophisticated still: hold that final click and move your cursor – the selection jumps by full words or full paragraphs each time … no missing letters!