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Original poster
Apr 12, 2001

Apple today updated its developer news site to remind developers about 64-bit requirements for both Mac and iOS apps.

Apple has required all new iOS apps and app updates submitted to the iOS App Store to support 64-bit since June of 2015. Since then, Apple has begun phasing out support for 32-bit apps, and plans to stop supporting them all together with iOS 11.


While Apple has enforced 64-bit support for several years, there are still a number of older iOS apps that have not been updated since 2015 but remain in use. When attempting to open a 32-bit app on iOS 11, it will not run and users will see a popup that says "The developer of this app needs to update it to work with iOS 11."
As a reminder, new iOS apps and updates submitted to the App Store must support 64-bit. Support for 32-bit apps is not available in iOS 11 and all 32-bit apps previously installed on a user's device will not launch. If you haven't updated your app on the App Store to support 64-bit, we recommend submitting an update so your users can continue to run your apps on iOS 11, which will be in the hands of hundreds of millions of customers this fall.
At WWDC, Apple announced plans to start phasing out 32-bit Mac App Store apps as well. Starting in January of 2018, Apple will require all new Mac apps submitted to the Mac App Store to support 64-bit, and all existing apps must implement support by June of 2018. According to Apple, macOS High Sierra will be the last version of macOS that will support 32-bit apps "without compromise."
At WWDC 2017, we announced new apps submitted to the Mac App Store must support 64-bit starting January 2018, and Mac app updates and existing apps must support 64-bit starting June 2018. If you distribute your apps outside the Mac App Store, we highly recommend distributing 64-bit binaries to make sure your users can continue to run your apps on future versions of macOS. macOS High Sierra will be the last macOS release to support 32-bit apps without compromise.
When phasing out 32-bit apps on iOS devices, Apple gave both end users and developers ample notice and several warnings, and the company plans to follow the same path as it phases out 32-bit Mac apps.

Along with reminding developers about its app requirements, Apple today also announced the availability of transcripts for all of its WWDC 2017 videos, making it easier for users to find and share specific information that was covered at the event. Transcripts can be searched by keyword, with those keywords linked to the specific times when they were mentioned.


Apple's session videos cover a wide range of topics, including Core ML, ARKit, Metal 2, Drag and Drop, Swift, Touch Bar, CareKit, tvOS, and much, much more.

Article Link: Apple Reminds Developers About 64-Bit Requirement for iOS and Mac Apps, Releases WWDC 2017 Transcripts
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macrumors 68040
May 29, 2003
Bye bye many games i enjoyed over the years :(

Decent money making ones will be recompiled to run on 64 bit. However I do wonder how many developers out there think that Apples guidance doesn't apply to them? You do make me wonder how many of the Homebrew apps I have installed will be a problem. Running the beta so far and things have been OK.


macrumors 65816
Jan 3, 2016
I'm sure going to miss Bookworm, but time moves on and so do operating systems. The improvements will outweigh the losses.


macrumors 68040
May 29, 2003
To be Honest I Think It’s a Bunch of ******** 32 bit apps have never Slow Down The iPad or iPhone Platforms They Could’ve Kept The Support For These Very Disappointing
Actually there are real issues here.

First; supporting 64 bit and 32 bit apps results in a lot of extra storage usage that can go to new features. If you want to offer your customer the best value in hardware you don't want to be installing a lot of worthless software to support old apps.

Second; developers that can't or won't upgrade software are often well behind the curve when it comes to modern software practices. This results in clunky software that fails to leverage modern features. It all means the bugs and other problems aren't being fixed.

Third; Long term, trying to support 32 bit in iOS means that you need the associated circuitry in the CPU!!! This means die space that goes to support unneeded functionality. I actually believe Apples goal is to migrate to completely clean 64 bit hardware for iOS devices. This saves Apple power or frees up die space for additional functionality. Some of that die space night very well go to the GPU to better support AI functionality or it might even mean an independent AI unit.

Forth; While at times it may be required to run old software that frankly is better done on old hardware with the corresponding software. I see this a lot in the automation industry where old software ends up unsupported and only running on old versions of Windows. You can end up banging your head against the wall trying to run old software on modern machines. It gets even worst if the software is tied to old unsupported hardware.


macrumors 604
Feb 4, 2004
Florida Resident
I will lose a ton of iOS apps that I really like that are likely never be updated with 64-bit. Some apps still work that have not been updated since 2011. So I'll dedicate an older iPad for those. On the Mac side, I will have less 32-bit apps but I can also create a Virtual Mac running under VmWare for 32-bit apps.

I welcome the 64-bit transition and I think it will be more clear after the transition why this was important to Apple that they can't tell us yet.


macrumors 65816
Feb 1, 2015
for iOS it's not so bad, but I really hope support holds for macos for a while longer


macrumors 601
May 14, 2012
Are they saying that High Sierra will be the last Mac OS to support 32 bit apps?
[doublepost=1498700802][/doublepost]I am assuming that I will be able to produce both binaries of 32/64-bit apps as I still develop apps for older iPhone 4 and 4S. That would be terrible if they deleted my apps out of the AppStore designed for older devices and shut down the AppStore for millions of iOS 8&9 users.
Also Apple has not adjust the numbers of available apps in their store from the 2.2 million now to the new lower number of only 64 bit apps.


Apr 29, 2009
Silicon Valley, CA
Then maybe Micro$oft should get off their butts and turn out a new 64 bit version, instead of foisting an antique off on people.

Office 2016 has been out for quite some time. Why in the world would Microsoft not put everything toward getting people on the new product instead of dedicating resources to people who haven’t bought from them in 7 years? What do you think their employees use to pay rent? Smiles?


macrumors G3
Jul 29, 2003
Silicon Valley
I am going to lose a lot of apps.

Out of curiosity what apps?

Every app I use is in 64bit.

I found over 60 apps on my iPhone which were 32-bit-only, and with no update available. Some were apps I first downloaded on my iPhone 3G 8 or 9 years ago, that I never deleted from backup before setting them up on my newer iPhones. Others were apps only 3 or 4 years old, but seem to be currently unsupported. Developer must have gone out of business. Fortunately, I found replacement apps for most of the utilities. But a few of the games were unique.

To be Honest I Think It’s a Bunch of ******** 32 bit apps have never Slow Down The iPad or iPhone Platforms They Could’ve Kept The Support For These ...

How do you know? It's quite hard, without some sophisticated debugging and profiling tools, to measure the storage, RAM, cache pollution, and CPU usage off all those 32-bit libraries. It could add up to gigabytes.

But the real reasons are possibly (1) a 32-bit OS doesn't work too well on a system with potentially 4 GB of memory or more (A11 or A12X?), (2) the CPU on some future iOS devices (the A11 on the iPhone 8?) might not even run 32-bit ARM code (which is a completely different ISA from arm64/armv8), and (3) if Apple has a gazillion engineers currently working on iOS 11, 12, 13 and etc., they didn't want to hire another extra gazillion engineers to do 32-bit ports of the same OS code.
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macrumors 6502
Jul 5, 2008
Big issue here is that a lot of the developers behind games that haven't had a recent update are simply not around anymore. Some games, like the Monkey Island remakes have even been removed from the App Store since a while ago - presumably because the development studio has been shut down, and haven't paid the yearly App Store fees. Only solution for the time being is to keep a dedicated device on an older iOS - and that won't be too bad, until said device dies.
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