Hi

No model of Apple Watch is waterproof.

Apple Watch Series 3 models are sufficiently water resistant that they can be used, for example, when shallow water swimming:

• About Apple Watch water resistance - Apple Support

Apple Watch Series 3 models remain equally water resistant regardless of whether or not Water Lock is turned on.

Water Lock prevents accidental screen interactions during exposure to water and also expels any water from the speaker afterwards.

Planned water exposure (except swimming workouts)

If you plan to get Apple Watch Series 3 wet under other circumstances than a swimming workout (such as during general wear in a pool), then you can manually turn on Water Lock first and then turn it off again afterwards (which is when water is cleared from inside the speaker):

• Swipe up from the bottom of the watch face to open Control Center > tap on Water Lock to lock the screen.
• When finished: turn the Digital Crown to unlock the screen and to clear water from the speaker.

Swimming workouts

Starting a swimming workout in the Workout app on Apple Watch Series 2 or 3 models automatically enables Water Lock, which locks the screen to prevent accidental interactions during your workout. To finish a workout and expel any water:     

• Press the Digital Crown and the side button at the same time (which pauses the workout).
• Turn the Digital Crown, which unlocks the screen and clears any water from inside the watch's speaker (it may make a sound).
• Swipe right and tap on End.

Accidental / other exposure to water

If the watch is exposed to water accidentally at any time or if you forget to enable it before planned exposure to water, Water Lock can be enabled afterwards and then immediately turned off again to expel any water from inside the speaker (by following the same steps as above).

After swimming or exposing it to anything other than fresh water, be sure to clean your Apple Watch Series 3 by gently rinsing it with warm tap water. The watch and band should also then be dried using a soft, lint-free cloth. Note that leather and stainless steel bands are not water resistant, so should not be worn in water.

More information and detailed handling instructions are provided by Apple here:

• Work out with your Apple Watch - Apple Support
• About Apple Watch water resistance - Apple Support
• Cleaning your Apple Watch - Apple Support
• Important handling information

Kurt Lang  that was  very helpful thank you for your time and courtesy have a great day sir.

How to download macOS High Sierra

Here are the system requirements for High Sierra. If your computer does not meet these requirements you can not install High Sierra.

macOS High Sierra - Technical Specifications

Aha, some further attempts have finally worked. I have paired the phone and watch and chosen restore from backup.

When all is ready do I dare try to update the watch software again?

You have been most helpful, thank you

Hi

With Zoom (an accessibility feature) enabled on your Apple Watch, double-tapping the screen with two fingers activates and deactivates a magnified view on the display:

• To disable Zoom:
  • On your iPhone, in the Watch app, go to: My Watch (tab) > General > Accessibility > Zoom - turn off.
  • Or on your watch, go to: Home screen (via a single press of the Digital Crown) > Settings (cog icon) > General > Accessibility > Zoom - tap and turn off / on.

• If the Accessibility Shortcut has been enabled and configured for Zoom:
  • On your watch: quickly press the Digital Crown (the round button) three times.

• To configure the Accessibility Shortcut:
  • On your iPhone, in the Watch app, go to: My Watch > General > Accessibility > Accessibility Shortcut (at the bottom) > select / deselect Zoom.

Hi

The following steps may help:

• Check that Theatre Mode / Cinema Mode is not enabled on your Apple Watch:
  • Be a considerate moviegoer with Theater Mode

• Check your Wake Screen settings:
  • On your iPhone, in the Watch app, go to: My Watch (tab) > General > Wake Screen > check that Wake Screen on Wrist Raise is enabled.
  • It may help to toggle the setting off and on again, if it is already turned on.

• Check your watch orientation settings (which tell your Apple Watch which way up and which way around you are wearing it):
  • On your iPhone, in the Watch app, go to: My Watch > General > Watch Orientation.

1. Turn the notifications off for the calendar on both devices
2. Restart both the Apple Watch and the iPhone
3. Turn the notifications back on for each device
    

Hi

Apple Watch does not recognise when you are sleeping.

To prevent notification alerts - including Stand and Breathe reminders - on your Apple Watch from disturbing you, but to still receive audible alerts for alarms and timers, turn on Do Not Disturb:

• On your Apple Watch: when viewing the time, swipe up on the watch face to open Control Centre > tap the Do Not Disturb button (crescent moon icon) to toggle the mode on and off.
• Use the Control Center on your Apple Watch - Apple Support

Your Apple Watch and iPhone can also be configured such that enabling Do Not Disturb mode on one device also enables it on the other.

This setting also applies to scheduled operation of the mode on your iPhone - which you may wish to set for a nightly schedule, covering the hours when you are usually sleeping:

• On your iPhone, in the Watch app, go to: My Watch (tab) > General > Do Not Disturb - turn on Mirror iPhone.
• On your iPhone, go to: Settings > Do Not Disturb - turn on Scheduled and set your preferred times.

It is not otherwise possible to limit Stand reminders to a specific time window.

If you would like to submit a feature request to Apple for any other options, then you can do so here: 

• Feedback - Apple Watch - Apple

It would not slow the watch down.

When activated on your iPhone's service plan, the built-in cellular capability on Apple Watch Series 3 (GPS + Cellular) enables certain features to remain available when using your Apple Watch away from the paired iPhone, when they would not be available on other models.

The functions that are available on your Apple Watch when it is away from your iPhone depend on various factors including:

• Your Apple Watch model:
  • Apple Watch - Compare - Apple
• The features of your carrier service plan:
  • Apple Watch - Carriers - Apple
  • Make a call with Wi-Fi Calling - Apple Support
• The type of connectivity that is available to your Apple Watch at the time:
  • About Bluetooth, Wi-Fi, and cellular on your Apple Watch - Apple Support

Features and requirements that apply under various circumstances are detailed here, including within the footnotes:

• How to use your Apple Watch without your iPhone nearby - Apple Support