How to update my iPhone 12

Instructions to update macOS are in the link above your post. If you are asking how to update your iPhone, then select Settings > General > Software Update. If your iPhone is eligible for an update, you will be prompted to do so. If I have not provided the information you need, please let me know but explain your question in more detail.

Jennyfrias Said:

"I don’t know how to update"

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Updating an iPhone 12:

Use my User Tips:

• Computer:  Update your iPhone Using a Computer - User Tip
• Cellular: Use an iPhone 12 or later, that is using 5G, in order to update over Cellular - User Tip

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