What 32 Bit Apps Does My Mac Have

[ Updated June 16, 2019, with mac OS Catalina and a link to an article explaining which media won’t work in the next OS. ]

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Recently Apple revealed support for 32-bit apps on macOS will soon be phased out of the operating system. Users on the latest version of the OS are seeing a warning dialog when opening 32-bit apps. You probably have some 32-bit apps on your computer. This article will show you how to check for 32-bit apps on your Mac. Mac’s Rants & Raves Episode #295. There has been some confusion about the status of 32-bit apps in macOS 10.14 Mojave, which will be available soon (for free).

Apple has made no secret that it is moving away from 32-bit applications to the new world of 64-bit; starting with macOS Catalina. But, how can you tell which applications are in jeopardy?

It’s easy and here’s how.

NOTE: Here’s an article that describes which 32-bit media codecs are also in jeopardy with the new version of OS.

From the Apple logo, choose About This Mac.

Click the System Report button.

In the sidebar on the left, scroll down until you see the Software category, then click Applications.

After several seconds, a list will appear on the right of all the applications installed on your system. There will be a LOT and many of them you may not have heard of because the software you use relies on a variety of helper applications which are not normally visible.

Click the name of an app, to learn more about it.

Click the 64-bit (Intel) column header at the top left of the window to sort all the 32-bit applications together.

Reviewing your list of software now will give you a better understanding of what will go away when Apple finally stops supporting 32-bit applications. More time to plan is always better.

SIDEBAR ON MEDIA

For media professionals, many of our older audio and video codecs are only 32-bit. I have not yet been able to get word from Apple on what happens to these when the transition to 64-bit is complete.

SUMMARY

For now, there’s nothing you need to do. Sierra and High Sierra still support most 32-bit applications. However, future versions of the macOS won’t. So, consider this a heads-up that allows you to better plan for the future.

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What 32 Bit Apps Are On My Mac

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Check 32 Bit Apps Mac

While iOS and macOS have historically supported both 32 and 64-bit apps,Apple has gradually deprecated 32-bit support.

As of iOS 11, 32-bit apps will no longer launch, andall submissions to the App Store must support 64-bit.

Starting in January 2018, new apps submitted to the Mac App Storemust support 64-bit, andexisting apps must be updated by June 2018.

Xamarin's Classic API (XamMac.dll and monotouch.dll) supported only32-bit applications. However, new Xamarin.iOS and Xamarin.Mac applicationsuse the Unified API(Xamarin.iOS and Xamarin.Mac) by default, and can therefore target both32 and 64-bit, as necessary.

iOS

Enabling 64-bit builds of Xamarin.iOS apps

Android For Pc 32 Bit

Warning

This section is included for historic reasons, and to help move older Xamarin.iOS projects to the Unified API and support 64-bit. All new Xamarin.iOS projects will use the Unified API and target 64-bit by default.

For Xamarin.iOS mobile applications that have been converted to the Unified API, developers must manually update the build settings to target 64-bit:

In the Solution Pad, double-click the app's project to open the Project Options window.
Select iOS Build.
For the iPhone Simulator, in the Supported architectures dropdown, select either x86_64 or i386 + x86_64:
For physical devices, select one of the available ARM64 combinations:
Click OK.
Perform a clean build.

In the Solution Explorer, right-click the app's project and select Properties.
Select iOS Build.
For the iPhone Simulator, set Supported architectures to either x86_64 or i386 + x86_64:
For physical devices, select one of the available ARM64 combinations:
Save your changes.
Perform a clean build.

ARMv7s is supported only by the A6 processor included in the iPhone 5 (or greater). ARMv7 code is faster and smaller than the ARMv6, only works with the iPhone 3GS and later, and is required by Apple when targeting the iPad or a minimum iOS version of 5.0. ARMv6 works on all devices but is no longer supported by the compiler shipped with Xcode 4.5 and later.

ARM64 is required to support iOS 8 on iPhone 6 or other 64-bit devices and will be required by Apple when submitting new or updating exiting applications in the iTunes App Store.

For a comprehensive look at the capabilities of various iOS devices, check out Apple'sDevice Compatibility document.

64-bit and binary size increases

During Apple's transition from 32-bit to 64-bit, iOS apps will need to run on both 32-bit and 64-bit hardware. Because of this, Xamarin's Unified API allows developers to target both.

Targeting both 32-bit and 64-bit architectures will significantly increase the size of an application. However, doing so will allow newer devices to run optimized code while still supporting older devices.

Important

If you receive the following message when submitting an iOS application to the iTunes App Store, 'WARNING ITMS-9000: Missing 64-bit support. Starting February 1, 2015, new iOS apps uploaded to the App Store must include 64-bit support and be built with the iOS 8 SDK, included in Xcode 6 or later. To enable 64-bit in your project, we recommend using the default Xcode build setting of “Standard architectures” to build a single binary with both 32-bit and 64-bit code.' You need to switch the supported architectures to one of the available ARM64 combination (as shown above), recompile and resubmit.

Mac

Important

Starting in January 2018, all new Mac apps submitted to theMac App Store must support 64-bit. Existing Mac App Store apps and theirupdates must support 64-bit starting in June 2018. SeeApple's announcmentand a guide that describes how to update your Xamarin.Mac apps to 64-bit.

Most modern Mac computers support both 32-bit and 64-bitapplications. MacOS 10.6 (Snow Leopard) was the lastoperating system to run on 32-bit systems. Most Macsreleased since 2010 support both systems.

Unlike iOS, many of the new frameworks introduced in recentversions of macOS are only supported in 64-bit mode (CloudKit,EventKit, GameController, LocalAuthentication, MediaLibrary,MultipeerConnectivity, NotificationCenter, GLKit, SpriteKit,Social, and MapKit, among others).

The Unified API allow developers to choose what kind ofapplications they want to produce: 32-bit or 64-bit.

32-bit applications will run on both 32-bit and64-bit Mac computers, have an address space limited to 32bits, and require that all libraries are 32 bits.

You will typically use this mode if you have 32-bitdependencies that do not run in 64-bit mode, if you want tohave a smaller download, or if there are no performancebenefits in moving to 64-bit.

This mode is limiting as you wont be able to use manyframeworks available in macOS Mavericks and macOS Yosemite.