I can't download application

Hi ericson51,

Welcome to the Apple Community.

Your query is posted in the MacOS High Sierra Community..

so am unsure if it is an iPhone, another device, or a Mac you are unable to update.

Eg: In order to be of help:

Wondering which Mac model you have, (Apple icon > "About this Mac")

and

which Mac OS versions are compatible with your Mac .. (depends on Mac model.)

and

Which Mac OS you are trying to update to from MacOS High Sierra..

or similar info about your iOS and iPhone / device.

You might want to try this article from Apple Support:

If you can’t download or update apps on your iPhone or iPad

https://support.apple.com/en-us/HT207165

All the best :-)

ericson51 Said:

"I can't download application: I can't update my ios version"

-------

Troubleshooting macOS Upgrade:

Verify Compatibility:

A. Start Here: Learn About Compatibility and how to Identify your Specific Mac Model - Apple Support

B. How to Verify:

I. Reveal your Model:

What is the Model of your Mac? To find out...

1. Go to: Apple menu
2. Click: About this Mac
3. View: Second Line-Down

then...

II. Compare the Results:

See if the Model you found is shown here:

• macOS Monterey is Compatible with these Computers - Apple Support

III. If Compatible:

• Back Up your Mac First:  Be certain you Create a Time Machine Backup of your Mac, so that way you can have something to restore your Mac from, should anything go wrong with the reconfiguration.

--

See iPhone Update Info Below.

See macOS Upgrade Info Above.

--

ericson51 Said:

"I can't download application: I can't update my ios version"

-------

Troubleshooting iPhone Update:

Determining if an Update will Install:

How to do so...

A. Verify Compatibility:

Identify your iPhone model. The first thing that comes to mind in incompatibility being the culprit. So, confirm the model of your iPhone. If iPhone model is incompatible with iOS13 and/or iOS14 and/or iOS15 then it is because you iPhone does not meet the hardware requirements for this iOS version(s).

B. If Compatible...

1. Back Up First:

IMPORTANT: If you have an option to update, however, then be certain you backup your iPhone first. That way, you will have something to restore your iPhone from should anything go wrong with the update

then...

2. Proceed with the Update:

Use my User Tip:  Update your iPhone Using a Computer - User Tip