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The line 64-bit Kernel and Extensions will say Yes if you are running the 64-bit kernel and No if you are running the 32-bit kernel. Note: Mac OS X 10.6 Snow Leopard is the last release that a 32-bit Intel Mac can run, Mac OS X 10.7 Lion and up are, by default, 64-bit. Additionally, System Profiler was renamed to System Information in OS X 10.7. In 64-bit versions of Mac OS 10.5 and later, some older, optional plug-ins are available only if Photoshop is running in 32-bit mode: In the Finder, choose Go Applications. Expand the Photoshop folder. Then right-click the Photoshop application icon, and choose Get Info. In the General section of the Info window, select Open In 32-bit Mode. Once you have located the processor name, compare it to the table below to determine if the processor is 32-bit or 64-bit capable. To determine if your Mac OS is running in 32-bit or 64-bit mode: NOTE: Mac Mountain Lion 10.8 and later do not support running in 32-bit mode. Click on the Apple menu and then choose About This Mac. MacOS 10.14 Mojave, the version of the Mac operating system before the new macOS Catalina, is the last version that supports 32-bit software.With Catalina, only 64-bit software will be supported. Launch Parallels Desktop. From the File menu, choose New to open the Installation Assistant.
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
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.
32 Bit Vs 64 Bit Application
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.
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.
32 Bit Vs 64 Bit Download
64-bit applications will only run on 64-bit Macdevices.
For Mac, this is the preferred mode of operation as mostMacs in use today support 64-bit mode, and you have access tothe complete set of frameworks provided by Apple.
32 Bit Or 64 Bit Machine
Enabling 64-bit builds of Xamarin.Mac apps
For information about building a 64-bit app using Xamarin.Mac,please see the Updating Xamarin.Mac Unified applications to 64-bitguide.
Related links
Apple began transitioning to 64-bit hardware and software technology for Mac over a decade ago, and all modern Macs now include powerful 64-bit processors that can run advanced 64-bit apps. These apps can access dramatically more memory, enable faster system performance, and take advantage of technologies that define today's Mac experience, such as Metal graphics acceleration.
Apple has been working with developers to transition their apps, and in 2018 Apple informed them that macOS Mojave would be the last version of macOS to run 32-bit apps.
Apple's transition to 64-bit technology is now complete. Starting with macOS Catalina, 32-bit apps are no longer compatible with macOS. If you have a 32-bit app, please check with the app developer for a 64-bit version.
Opening 32-bit apps
When you attempt to open a 32-bit app, you will see an alert that the app needs to be updated to work with this version of macOS, or that the app is not optimized for your Mac and needs to be updated.
macOS Catalina
macOS Mojave and macOS High Sierra
If you haven't upgraded to macOS Catalina, you can still open and use the app, but you should check with the app developer for a 64-bit version that also works with the latest macOS.
How to find 32-bit apps on your Mac
32 Bit Vs 64 Bit Machine
System Information can find 32-bit apps that are installed on your Mac:
- Choose Apple menu > About This Mac, then click the System Report button.
- Select Legacy Software in the sidebar. All legacy software is 32-bit.
- If you don't see Legacy Software in the sidebar, select Applications in the sidebar, then check the list of apps on the right. The column labeled '64-Bit (Intel)' shows 'No' for apps that are 32-bit.
When upgrading to macOS Catalina, the installer shows a list of recently used apps that are 32-bit. You can review this list before choosing whether to cancel or continue the installation:
macOS Catalina also shows a prohibitory symbol over the icon of each 32-bit app in the Finder, letting you know that the app will not open.
How to contact the app developer
The developer (or vendor) is the person or company that made the app. The easiest way to find contact information for an app's developer is to search the web for their name or the name of their app. Learn more about contacting third-party vendors.
To find the name of the developer:
Ableton Live 32 Bit Or 64 Bit Mac
- Select the app in the Finder.
- Choose File > Get Info from the menu bar.
- Look for copyright information in the Info window. For example, Apple is the developer of this app: