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Vintage and obsolete products
Owners of iPhone, iPad, iPod, or Mac products may obtain service and parts from Apple or Apple service providers for 5 years after the product is no longer manufactured—or longer where required by law. Apple has discontinued support for certain technologically obsolete and vintage products.

Vintage products are those that have not been manufactured for more than 5 and less than 7 years ago. Apple has discontinued hardware service for vintage products with the following exceptions:

Mac products purchased in the country of Turkey. Owners of vintage Mac products may obtain service and parts from Apple service providers within the country of Turkey.
Products purchased in the state of California, United States, as required by statute.
Owners of vintage Mac products may obtain service and parts from Apple service providers within the state of California, United States. 
Owners of vintage iPod products in the state of California may obtain service from Apple Retail Stores or by contac

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If you type the letter “i” and it autocorrects to an “A” with a symbol
If you updated your iPhone, iPad, or iPod touch to iOS 11 or later and find that when you type the letter “i” it autocorrects to the letter “A” with a symbol, learn what to do.

Try setting up Text Replacement for the letter "i"

Here’s what you can do to work around the issue until it’s fixed in a future software update:
Go to Settings > General > Keyboard > Text Replacement.
Tap .
For Phrase, type an upper-case "I". For Shortcut, type a lower-case "i."
This document will be updated as more information becomes available.

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Avoid phishing emails, fake ‘virus‘ alerts, phony support calls, and other scams
Use these tips to avoid scams and learn what to do if you think your Apple ID has been compromised.

If you see a message while browsing the web that your iPhone, Mac, or other Apple device has a virus, or someone claiming to be from Apple calls and asks for your account name and password, you’re likely the target of a scam.
Scammers use any means they can—fake emails, pop-up ads, text messages, even phone calls—to try to trick you into sharing personal information, such as your Apple ID password or credit card information. Use this information to protect your account and avoid scams.
Protect your Apple ID

Never share your Apple ID password or temporary verification codes with anyone. Apple will never ask you for this information to provide support.
Use two-factor authentication to protect your Apple ID. Learn more about security and your Apple ID.
If you believe that your Apple ID has been compromised, change your password imme

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About the security content of iOS 11.1
This document describes the security content of iOS 11.1.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.

iOS 11.1

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About the security content of macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan
This document describes the security content of macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan.

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.

macOS High Sierra 10.13.1, Security Update 2017-001 Sierra, and Security Update 2017-004 El Capitan

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How to set and manage alarms on your iPhone
Learn how to set and edit an alarm, have Siri set an alarm for you, and track your bedtime.



With the Clock app, you can turn your iPhone into an alarm clock. Just open the Clock app from the Home screen or Control Center. You can also ask Siri to set an alarm for you.
 
     
Set an alarm

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How to enable the root user on your Mac or change your root password
Mac administrators can use the root user account to perform tasks that require access to more areas of the system.

The user account named ”root” is a superuser with read and write privileges to more areas of the system, including files in other macOS user accounts. The root user is disabled by default. If you can log in to your Mac with an administrator account, you can enable the root user, then log in as the root user to complete your task.
The root user account is not intended for routine use. Its privileges allow changes to files that are required by your Mac. To undo such changes, you might need to reinstall your system software. You should disable the root user after completing your task. 

It's safer to use the sudo command in Terminal instead of enabling the root user. To learn about sudo, open the Terminal app and enter man sudo.
Enable or disable the root user

Choose Apple menu () > System Preferences, then click Users & Groups 

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diff -r macOSUpd10.13Supplemental/Library/CoreServices/Applications/Directory Utility.app/Contents/Info.plist macOSUpd10.13.1Supplemental/Library/CoreServices/Applications/Directory Utility.app/Contents/Info.plist
38c38
< 	<string>9M189u</string>
---
> 	<string>9A229</string>
42c42
< 	<string>17A405</string>
---
> 	<string>17B48</string>
48c48

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About the security content of Security Update 2017-001
This document describes the security content of Security Update 2017-001. 

About Apple security updates

For our customers' protection, Apple doesn't disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. Recent releases are listed on the Apple security updates page.
For more information about security, see the Apple Product Security page. You can encrypt communications with Apple using the Apple Product Security PGP Key.
Apple security documents reference vulnerabilities by CVE-ID when possible.

Security Update 2017-001

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If your iPhone, iPad, or iPod touch unexpectedly restarts
If your device with iOS 11 unexpectedly restarts repeatedly on or after December 2, 2017, learn what to do. 

Try to update your device to iOS 11.2. After you tap Download and Install, the download will continue even if your device restarts. Wait for the update to complete.
If you can't update, turn off notifications for all the apps on your device, then update your device to iOS 11.2:
Tap Settings > Notifications.
Tap an app, then turn off Allow Notifications. Repeat this step for each app.
Update your device to iOS 11.2.
After updating, tap Settings > Notifications and turn Allow Notifications on again for each app.
You can also update your device using iTunes. Follow these steps: