Apple Stops Signing iOS 13.5.1 Following Release of iOS 13.6 - MacRumorsOpen MenuShow RoundupsShow Forums menuVisit ForumsOpen Sidebar
Skip to Content

Apple Stops Signing iOS 13.5.1 Following Release of iOS 13.6

by

Following the release of iOS 13.6 on July 15, Apple has stopped signing iOS 13.5.1, which means downgrading to that version of iOS is no longer possible.

iOS 13
iOS 13.5.1 was a security update that was released to address the vulnerability that allowed for the unc0ver jailbreaking tool that worked with many recent versions of iOS, including iOS 13.5.

Apple routinely stops signing older versions of software updates after new releases come out in order to encourage customers to keep their operating systems up to date.

iOS 13.6, which introduced Car Keys, Apple News audio stories, and more, is the only current publicly available version of iOS that can be installed on iPhones and iPads. Apple has also seeded betas of upcoming iOS and iPadOS 14 updates to developers and public beta testers.

Popular Stories

iOS 27 Next to iPhone

Here's When iOS 27 Rolls Out Today in Every Time Zone [Update: It's Out]

Sunday September 13, 2026 3:00 am PDT by
Update 10:04 a.m.: iOS 27 is rolling out now, though it may take a bit for all users to see it, so keep checking! Apple is about to release iOS 27, which will finally deliver more advanced Siri AI capabilities as well as a variety of other refinements, improvements, and new features to iPhones. It's Apple's biggest software update of the year, and Apple announced at Wednesday's iPhone event...
Read Full Article • 151 comments
iOS 27 Icon iPhone

iOS 27 Available Now With These 8 New Features

Monday September 14, 2026 9:00 am PDT by
Update — 10 a.m. Pacific Time: Apple has released iOS 27. During its iPhone 18 Pro and iPhone Duo event last week, Apple announced that iOS 27 will be released widely on Monday, September 14. iOS 27 should be available around 10 a.m. Pacific Time / 1 p.m. Eastern Time today via the Settings app, under General → Software Update. Below, we have highlighted eight new features and...
Read Full Article • 111 comments
Apple iCloud Plus expansion hero

iCloud+ Now Includes Apple TV, Apple Arcade, and Curated Apple Music Stations in Over 100 Countries

Tuesday September 15, 2026 1:43 am PDT by
Apple today announced a new subscription initiative that turns paid iCloud+ subscriptions into a broader services bundle in more than 100 countries. In select countries, Apple says every paid iCloud+ plan, including the cheapest 50GB tier, now includes Apple TV and Apple Arcade "at no additional cost," while family sharing extends the storage, TV and Arcade access to up to five people....
Read Full Article • 103 comments

Top Rated Comments

BaltimoreMediaBlog Avatar
BaltimoreMediaBlog
80 months ago
This is the one Apple practice that I most despise. This is what cost me 50+ 32 bit games apps that I then had to purchase all over again mostly or just forget them as some were never updated. I think this practice should be illegal in fact.

I had a battery replacement also that Apple made me pay for, but then shipped the phone back to me with an updated IOS that ruined 50+ apps.

This is just a horrible practice on so many levels.
Score: 9 Votes (Like | Disagree)
Westside guy Avatar
Westside guy
80 months ago

Who wish to go back to 13.5.1? I would have liked not to have ever updated: it ruined my iPad that was replaced by Apple being at the end of the 1st year of life
I'd like to go back to 10.3.3, personally. 😁
Score: 6 Votes (Like | Disagree)
Apple_Robert Avatar
Apple_Robert
80 months ago

This is the one Apple practice that I most despise. This is what cost me 50+ 32 bit games apps that I then had to purchase all over again mostly or just forget them as some were never updated. I think this practice should be illegal in fact.

I had a battery replacement also that Apple made me pay for, but then shipped the phone back to me with an updated IOS that ruined 50+ apps.

This is just a horrible practice on so many levels.
Apple is trying to look out for people who don’t install updates that are often security based. If Apple didn’t do this kind of thing and numerous people got exploited, there would be a class action suit filed quicker than I can finish typing this post.

Apple is being pro active. And for many people, Apple is a bit too extreme.
Score: 3 Votes (Like | Disagree)
PickUrPoison Avatar
PickUrPoison
80 months ago

Almost 400? You’re kidding right?
Nope. And my 6s handles them beautifully 🙂 iOS 13.6, not so much.




PS I have managed to pare it down a little over the last couple weeks...

https://forums.macrumors.com/threads/google-to-dramatically-improve-chrome-impact-on-mac-battery-life.2245544/post-28668481

Attachment Image
Score: 2 Votes (Like | Disagree)
PickUrPoison Avatar
PickUrPoison
80 months ago

Fastest I have ever in my life hit 'Update'. 13.5.1 was a turd supreme. Don't even care what regressed.
I’m having more problems with 13.6 than I ever had with 13.5.1. News just sits there and spins before the “For You” section.

But my big issue is that the order of my Safari tabs keep shifting around—very frustrating because they’re mapped in my head and I expect to see tabs in a certain order. Even after I move them back to where they’re “supposed” to be, they won’t stay that way. They move back to within a few tabs of where they were before I moved them 🤬

As someone who has almost 400 open tabs, yeah, I’m frustrated. It’s screwing with my my finely honed system 😂
Score: 2 Votes (Like | Disagree)
derbothaus Avatar
derbothaus
80 months ago
Fastest I have ever in my life hit 'Update'. 13.5.1 was a turd supreme. Don't even care what regressed.
Score: 2 Votes (Like | Disagree)
Read All Comments