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Original poster
Apr 12, 2001
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Following today's release of iOS 14.5.1 and last week's release of iOS 14.5, Apple has stopped signing iOS 14.4.2, the previously available version of iOS 14 released on March 26. With iOS 14.4.2 no longer being signed, it is not possible to downgrade to iOS 14.4.2 from iOS 14.5 or iOS 14.5.1 if you've already updated your iPhone or iPad.

iOS-14.4.2-on-phone-icon-fix.jpg

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 14.4.2 was a security update that addressed a vulnerability where processing maliciously crafted web content could lead to universal cross-site scripting. iOS 14.5 released last week addressed a number of security issues, and today's release of iOS 14.5.1 addresses another pair of WebKit issues that may have been actively exploited, so those who have not yet updated should do so.

Article Link: Apple Stops Signing iOS 14.4.2 After Releasing iOS 14.5.1 With Fix for Actively Exploited Security Issues
 

Menneisyys2

macrumors 603
Jun 7, 2011
5,447
232
"iOS 14.5.1 addresses another pair of WebKit issues that may have been actively exploited"

Which means anyone hoping for a future jailbreak for A12+ should stay away. Particularly now that 14.5 is pretty stable and already has all the goodies (mask unlock, AirTag etc.).
 
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doboy

macrumors 68040
Jul 6, 2007
3,021
1,669
Months and months of iOS 14.5 betas totaling six - then when it finally releases they've got to scramble to fix a security flaw a week later
They also fixed an non-security (app tracking) issue that they caused even after all the betas.
 
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abbstrack

macrumors regular
Nov 21, 2008
249
42
SoCal
wondering how restore from backup works in this instance. i had a brand new 2020 iPad pro that i returned after learning of the new M1 model. It was not yet on 14.5 when I returned it, so presumably it was on 14.4.2 when I last did an icloud backup before returning it. When receive my new iPad pro, does restore from backup also attempt to install an older SW version, or is it just profile, settings, apps, etc?
 
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doboy

macrumors 68040
Jul 6, 2007
3,021
1,669
wondering how restore from backup works in this instance. i had a brand new 2020 iPad pro that i returned after learning of the new M1 model. It was not yet on 14.5 when I returned it, so presumably it was on 14.4.2 when I last did an icloud backup before returning it. When receive my new iPad pro, does restore from backup also attempt to install an older SW version, or is it just profile, settings, apps, etc?
No it'll just load your data on top of whatever iOS it comes with.
 
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BornAgainMac

macrumors 604
Feb 4, 2004
6,637
3,849
Florida Resident
I just hate those "????" Needs to be Updated - The developer of this app needs to update it to work with this version of iOS. Click OK.

I have the worst luck with app compatibility. Doesn't seem to be a 32-bit issue but something more mysterious.
 
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valkov9191

macrumors member
Aug 14, 2020
38
26
Great, a while ago I thought to put 14.4.2 because the problems with the Wi Fi connection continue and it's terrible. The connection is either missing or very, very slow, I was hoping that in 14.5.1 this bug was fixed, unfortunately not and I don't know how much longer I will have to wait until they fix it! Shame Apple!
 
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RalfTheDog

macrumors 68000
Feb 23, 2010
1,535
347
Lagrange Point
I just hate those "????" Needs to be Updated - The developer of this app needs to update it to work with this version of iOS. Click OK.

I have the worst luck with app compatibility. Doesn't seem to be a 32-bit issue but something more mysterious.
Perhaps it is related to user tracking and ads.
 
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BaltimoreMediaBlog

macrumors 65816
Jul 30, 2015
1,086
1,941
DC / Baltimore / Northeast
This is another thing that should be dragged to court, OS downgrade limitations.

I totally agree. I've been saying this for years. The IOS 10 to 11 upgrade cost me nearly 50 free 32 bit games, and there was no way to go back and because Apple forced the upgrade on me as my iPhone was in repair at Apple. Basically, they damaged the unit in my opinion. This is one thing that should be a class action lawsuit that rarely anyone ever mentions. Oh, of course Apple did return my iPhone in full working condition as they call it, but not in the condition I sent it to them, but with only half of my apps functional.
 
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Sasparilla

macrumors 68000
Jul 6, 2012
1,602
2,619
Do we know if the WebKit issue was limited to just 14.5.0, or is it also present on 14.4.2?
Don’t know, but since there haven’t been big changes in WebKit there it’s probably safer to assume the actively exploited (in the wild) web page bug is present in earlier versions…including 14.4.2.
 
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Populus

macrumors 68000
Aug 24, 2012
1,811
1,945
Valencia, Spain.
Don’t know, but since there haven’t been big changes in WebKit there it’s probably safer to assume the actively exploited (in the wild) web page bug is present in earlier versions…including 14.4.2.
If we can get any identification for the exploits (the number, the name) we can compare between the exploits 14.4.2 patched and the ones 14.5.1 patches. We compare and if they are the same IDs, it’s the same patch. If they differ, that means the exploits are present in 14.4.2
 
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gnasher729

Suspended
Nov 25, 2005
17,945
5,494
wondering how restore from backup works in this instance. i had a brand new 2020 iPad pro that i returned after learning of the new M1 model. It was not yet on 14.5 when I returned it, so presumably it was on 14.4.2 when I last did an icloud backup before returning it. When receive my new iPad pro, does restore from backup also attempt to install an older SW version, or is it just profile, settings, apps, etc?
OS and applications are not backed up and restored, the phone will just download the latest version. So if you finally replace your iPhone 6 on 12.5.2, then the new phone will have the latest iOS version it can handle.
 
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JPSaltzman

macrumors 6502
Jun 5, 2011
308
584
I hope iOS 14.5 doesn't turn out to be a fiasco like iOS 13.x was, where every single week (it seemed) there was yet another .1 (point-one) release to fix some bug.
 
Comment

dmi

macrumors regular
Dec 21, 2010
123
4
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.
Their routine is acting contrary to its stated purpose for this user, who was about to update but is now reluctant to do something irreversible.
 
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saudor

macrumors 6502a
Jul 18, 2011
933
846
Sweet. Was able to get back to 14.4.2 in time so i can run my older apps again. (many new ones have additional bugs, performance degradation and other functionality broken)
 
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