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iPhone SE 2000 iOS 15.5 Security Update keeps failing to install security update 15.6

Every night I plug in phone for overnight update. For weeks message keeps appearing unable to install Security Update on my iPhone. Was purchased in Dec 2021 iPhone SE running iOS 15.5. What do I do?

iPhone SE, iOS 15

Posted on Aug 18, 2022 2:11 PM

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Question marked as Top-ranking reply

Posted on Aug 18, 2022 2:50 PM

"If you can't see the update on your device, use your Computer to update

your device Manually. Learn how to update your device manually..

1. if you're using a Mac with macOS Catalina or later, or

2. if you're using a Mac with macOS Mojave, or earlier; or a Windows PC."

blue links spelled out:

• Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

Update your iPhone, iPad, or iPod touch with iTunes - Apple Support


3 replies
Question marked as Top-ranking reply

Aug 18, 2022 4:34 PM in response to eercolani

When your iPhone has been set to automatically update (download+update)

you may consider setting auto-factor, off; so the download is more manual.


You manually choose to run the updater, it may download & wait there.

And it is not a security update, the latest download should include that too.


(You could try calling AppleCare, to see if they suggest taking iPhone to

AASP or Apple store genius(?) That iOS updates latest iPhone iOS 15.6.1)


You may try to download and update iPhone but it may not work. What

build year model MacBook have you? ~ It may yet upgrade to 10.13.6.


If your iPhone, iPad, or iPod touch won't update - Apple Support

//support.apple.com/en-us/HT201435


But I'd ask AppleCare if they could direct you to nearest Apple location

who can assist in download/install of iPhone update iOS 15.6.1 for now.

If there's nobody? I've been there before.


Did you repost this topic? I see another of same name.


iPhone SE 2000 iOS 15.5 Security Update keeps failing to install security update 15.6

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