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In Visual Studio for Mac, to enable TLS 1.2 in a Xamarin.Mac app, update the HttpClient Implementation option in Project Options Build Mac Build: Warning The upcoming Xamarin.Mac 4.8 release will only support macOS 10.9 or higher.
-->Using the latest version of Transport Layer Security (TLS)is important to ensure application network communications are secure.
Warning
April, 2018 – Due to increased security requirements, including PCI compliance, major cloud providers and web servers are expected to stop supporting TLS versions older than 1.2. Xamarin projects created in previous versions of Visual Studio default to use older versions of TLS.
In order to ensure your apps continue to work with these servers and services, you should update your Xamarin projects to use the settings below, then re-build and re-deploy your apps to your users.
Projects must reference the System.Net.Http assembly and be configured as shown below.
Update Xamarin.Android to TLS 1.2
Update the HttpClient implementation and SSL/TLS implementation options to enable TLS 1.2 security.
These settings can be found in Project Properties > Android Options and then clicking on the Advanced button:
These settings can be found in Project Options > Build > Android Build tab:
Update Xamarin.iOS to TLS 1.2
Update the HttpClient Implementation option to enable TSL 1.2 security.
This setting can be found in Project Properties > iOS Build:
This setting can be found in Project Options > Build > iOS Build tab:
Update Xamarin.Mac to TLS 1.2
In Visual Studio for Mac, to enable TLS 1.2 in a Xamarin.Mac app, update theHttpClient Implementation option in Project Options > Build > Mac Build:
Warning
The upcoming Xamarin.Mac 4.8 release will only support macOS 10.9 or higher.Previous versions of Xamarin.Mac supported macOS 10.7 or higher, butthese older macOS versions lack sufficient TLS infrastructure to supportTLS 1.2. To target macOS 10.7 or macOS 10.8, use Xamarin.Mac 4.6 orearlier.
Alternative configuration options
This section discusses alternatives to the TLS 1.2-supported configurations shown above.Application developers should only consider these alternatives if they understand the risksof using different levels of TLS support.
HttpClient implementation
Xamarin developers have always been able to use the native networking classesin their code, however there is also an option that determines which networkingstack is used by the
HttpClient
classes. This provides a familiar .NET APIthat has the speed and security advantages of the native platform.The options are:
- Managed stack – the Mono-provided network functionality, or
- Native stack – various networking APIs provided by the underlyingplatforms (Android, iOS, or macOS).
The managed stack provides the highest level of compatibility with existing.NET code, however it can be slower and result in larger executable size.
The native options can be faster and have better security (including TLS 1.2),but may not provide all the functionality and options of the
HttpClient
class.SSL/TLS implementation (Android)
Android project options also let you choose which SSL/TLS implementation to support:
- Mono/Managed – TLS 1.1 on Android
- Native – TLS 1.2 on Android.
New Xamarin projects default to the native implementation thatsupports TLS 1.2 (which is recommended for all projects),however you can switch back to the managed code if required for compatibility reasons.
Important
The Mono/Managed option has been removed from iOS and Mac project options.
The Native option is always used on iOS and Mac platforms.
Mac App Store
Platform-specific details
The above summary explains the project-level settings for HttpClientand SSL/TLS implementation in Xamarin Projects. The HttpClient implementationcan also be set dynamically in code. Refer to these platform-specific guides for more information:
Found App For Mac
Summary
Applications should use Transport Layer Security (TLS) 1.2 wherever possible.You should update the settings in existing applications according to the instructionsin this article, then re-build and re-deploy to your customers.
Related links
Back up your library
Before following any of these steps, it's a good idea to create a backup of your photo library, even if you use iCloud Photos. You can use Time Machine, use a third-party backup solution, or copy the library to an external drive. By default, your photo library is stored in the Pictures folder within your home folder.
Make sure that your software is up to date
![Found Found](/uploads/1/1/0/4/110432269/841913684.jpg)
Photos is part of the Mac operating system. You can avoid or fix many issues by running the most up-to-date version of macOS. Learn more about updating the software on your Mac.
If you use RAW images in Photos, learn more about the digital camera RAW formats supported by iOS, iPadOS, and macOS.
If you have trouble migrating an existing iPhoto or Aperture library to Photos
You might see an alert message when you first open Photos or migrate an existing iPhoto or Aperture library. Learn what to do if Photos can’t copy or create a library.
If the Media Browser isn't showing your photos and videos
Use the Media Browser to make images from your photo library available in other apps, like Pages and iMovie. The Media Browser shows only the contents of the Photos library designated as the System Photo Library. If you have more than one Photos library—and the one you're using isn't set as the System Photo Library—the Media Browser won't show its contents.
Follow these steps to designate the current library as the System Photo Library:
- Choose Photos > Preferences.
- Click the General button at the top of the Preferences window.
- Click Use as System Photo Library.
If you're having other issues with Photos
If you're experiencing other issues—like missing or blank photo thumbnails, unexpected behavior, or if Photos won’t open—try to see if it's an issue with your library by following these steps.
Create a new Photos library and see if your issues persist:
- Quit Photos.
- Press and hold the Option key while you open Photos.
- In the dialog that appears, click Create New.
- Give your new library a name, then click OK. Note whether Photos opens successfully with this new library.
Mac App Store Download
To return to your main Photos library, quit Photos. Then open it again while holding the Option key, select your main library, and click Choose Library.
Alternatively, you can open Photos in another user account on your Mac and note whether Photos opens successfully.
If Photos opens with the new library, or in a different user account, it might mean that there's an issue with your library. Follow the steps to use the Photos library repair tool on your main Photos library.
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Learn more
- Learn how to create and order print products like books or calendars in Photos with Project Extensions.
- Get help with iCloud Photos.