06.08.2020

Mac Only Use Apps With Specific Users

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When macOS Mojave was announced, Apple warned that it would be the last version of macOS that would support older 32-bit apps. Apple has been phasing out 32-bit apps for the last 10 years and is now ready to take the final step, even if Mac users may not be ready to lose access to older apps.

With the release of macOS Catalina, 32-bit app support is no longer available, which means many of your older apps will no longer work if they haven't been updated to 64-bit.

32-bit vs. 64-bit

32-bit apps date back to a time when there were 32-bit processors and 32-bit operating systems, but are now outdated. Apple has long since transitioned to 64-bit processors and macOS has been 64-bit since the launch of Snow Leopard in 2009.

Compared to 32-bit apps, 64-bit apps can take advantage of more memory and offer faster system performance. Apple technologies like Metal only work with 64-bit apps, and for Apple to ensure that Mac apps include all of the latest advancements and optimizations, support for 32-bit needs to end. In the simplest terms, 32-bit apps are inefficient.

32-bit apps can run on a 64-bit system as they've been doing for years, but Apple wants to get rid of outdated apps to make sure everything that runs on the Mac is properly optimized and isn't an unnecessary drain on system resources.

Previous Warnings

Apple started warning Mac users about plans to end support for 32-bit apps back with macOS High Sierra. In High Sierra, users started getting warnings about a 32-bit app's future incompatibility with macOS.

A similar message was available in macOS Mojave, and if you opened up a 32-bit app while running Mojave, you saw an alert letting you know a specific app wouldn't work with future versions of macOS unless it was updated.

Alerts re-appeared every 30 days when launching an app, with Apple aiming to make sure customers would not be caught unaware when a 32-bit app stopped working in the future, so you should already know if one of your frequently used apps hasn't been upgraded to 64-bit.

Upon updating to ‌macOS Catalina‌, you'll be shown a list of 32-bit apps that no longer work on your system.

How to Check if an App is 32-Bit or 64-Bit in macOS Mojave

To determine whether an app is 64-bit or 32-bit and to see if there are 32-bit apps installed on your machine before upgrading to ‌macOS Catalina‌, follow these steps:

Click the Apple symbol () in the menu bar on your Mac's desktop.
Click on About This Mac.
Choose 'System Report' at the bottom of the window.
Scroll down to the Software list on the sidebar.
Select Legacy Software.'

Anything in the list of Legacy Software applications is a 32-bit app and will not work when upgrading to ‌macOS Catalina‌.

If Legacy Software isn't an option in the sidebar, select the Applications option and then check the list of apps at the right. The column that's labeled 64-bit will show a 'No' listing for apps that are 32-bit.

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How to Prepare to Update to ‌macOS Catalina‌

The first step is to make sure there aren't already available updates for apps that you have on your system, which you can generally do by updating through the Mac App Store for ‌Mac App Store‌ apps.

Apps outside of the ‌Mac App Store‌ use other update methods that can vary by app, but for many, you can click on the app's name in the menu bar and choose the 'Check for Updates' option. Some other apps have more hidden update methods, so if you do have a 32-bit app, make sure to Google how to update it to be sure there's not already new software available.

After ensuring you've updated everything you're able to update, you can contact developers and ask them to update their apps, but if that doesn't pan out, the only other solution is to start the search for an alternative app if you're committed to upgrading to ‌macOS Catalina‌ or have already done so.

32-Bit App Warnings When Installing Catalina

When upgrading to ‌macOS Catalina‌, the installer will show a list of recently used apps that are 32-bit so you know what to expect before installing.

After viewing this list, you can choose to either cancel or continue with the installation.

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‌macOS Catalina‌ also shows a stop symbol over the icon of 32-bit apps in the Finder, so you know that the app isn't going to open.

Aperture

With the release of ‌macOS Catalina‌, Aperture is going to stop working. Apple warned Aperture users in April 2019 that the software won't run in future versions of macOS, starting with ‌macOS Catalina‌.

If you're an Aperture user, you'll have to transition to alternate photo editing and management software, such as Adobe's Lightroom. Aperture is not 32-bit, but Apple is phasing it out all the same.

Affected Media Formats

Certain media files that use older formats and codecs are also not compatible with macOS after macOS Mojave due to the 64-bit transition, and you will need to convert some iMovie and Final Cut Pro X libraries. Incompatible media files were created using codecs that rely on QuickTime 7, and while macOS Mojave has QuickTime 7 frameworks, future versions of macOS will not.

Apple has a full list of media formats that are going to be affected by the transition available in a support document.

Continuing to Use 32-Bit Apps

In macOS Mojave and earlier versions of macOS like High Sierra, you can continue to use your 32-bit apps. If you have a 32-bit app that you absolutely depend on, you're going to want to think twice before upgrading to ‌macOS Catalina‌.

Guide Feedback

Have questions about the end of support for 32-bit apps or want to offer feedback on this guide? Send us an email here.

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As an admin, you can use app permission policies to control what apps are available to Microsoft Teams users in your organization. You can allow or block all apps or specific apps published by Microsoft, third-parties, and your organization. When you block an app, users who have the policy are unable to install it from the Teams app store. You must be a global admin or Teams service admin to manage these policies.

You manage app permission policies in the Microsoft Teams admin center. You can use the global (Org-wide default) policy or create and assign custom policies. Users in your organization will automatically get the global policy unless you create and assign a custom policy. After you edit or assign a policy, it can take a few hours for changes to take effect.

Note

Org-wide app settings override the global policy and any custom policies that you create and assign to users.

If your organization is already on Teams, the app settings you configured in Tenant-wide settings in the Microsoft 365 admin center are reflected in org-wide app settings on the Manage apps page. If you're new to Teams and just getting started, by default, all apps are allowed in the global policy. This includes apps published by Microsoft, third-parties, and your organization.

Say, for example, you want to block all third-party apps and allow specific apps from Microsoft for the HR team in your organization. First, you would go to the Manage apps page and make sure that the apps that you want to allow for the HR team are allowed at the org level. Then, create a custom policy named HR App Permission Policy, set it to block and allow the apps that you want, and assign it to users on the HR team.

Note

If you deployed Teams in a Microsoft 365 Government Community Cloud (GCC) environment, see Manage org-wide app settings for Microsoft 365 Government to learn more about third-party app settings that are unique to GCC.

Create a custom app permission policy

If you want to control the apps that are available for different groups of users in your organization, create and assign one or more custom app permission policies. You can create and assign separate custom policies based on whether apps are published by Microsoft, third-parties, or your organization. It's important to know that after you create a custom policy, you can't change it if third-party apps are disabled in org-wide app settings.

In the left navigation of the Microsoft Teams admin center, go to Teams apps > Permission policies.
Click Add.
Enter a name and description for the policy.
Under Microsoft apps, Third-party apps, and Custom apps, select one of the following:
- Allow all apps
- Allow specific apps and block all others
- Block specific apps and allow all others
- Block all apps
If you selected Allow specific apps and block others, add the apps that you want to allow:
1. Select Allow apps.
2. Search for the apps that you want to allow, and then click Add. The search results are filtered to the app publisher (Microsoft apps, Third-party apps, or Custom apps).
3. When you've chosen the list of apps, click Allow.
Similarly, if you selected Block specific apps and allow all others, search for and add the apps that you want to block, and then click Block.
Click Save.

Edit an app permission policy

You can use the Microsoft Teams admin center to edit a policy, including the global policy and custom policies that you create.

In the left navigation of the Microsoft Teams admin center, go to Teams apps > Permission policies.
Select the policy by clicking to the left of the policy name, and then click Edit.
From here, make the changes that you want. You can manage settings based on the app publisher and add and remove apps based on the allow/block setting.
Click Save.

Assign a custom app permission policy to users

You can assign a policy directly to users, either individually or at scale through a batch assignment (if supported for the policy type), or to a group that the users are members of (if supported for the policy type).

To learn about the different ways that you can assign policies to users, see Assign policies to your users in Teams.

Manage org-wide app settings for Microsoft 365 Government

In a Microsoft 365 Government - GCC deployment of Teams, it's important to know the following about third-party app settings, which are unique to GCC.

In GCC, all third-party apps are blocked by default. Additionally, you'll see the following note about managing third-party apps on the app permission policies page in the Microsoft Teams admin center.

Use org-wide app settings to control whether users can install third-party apps. Org-wide app settings govern the behavior for all users and override any other app permission policies assigned to users. You can use them to control malicious or problematic apps.

On the Permission policies page, select Org-wide app settings. You can then configure the settings you want in the panel.
Under Third-party apps, turn off or turn on these settings to control access to third-party apps:
- Allow third-party apps: This controls whether users can use third-party apps. If you turn off this setting, your users won't be able to install or use any third-party apps. In a Microsoft 365 Government - GCC deployment of Teams, this setting is off by default.
- Allow any new third-party apps published to the store by default: This controls whether new third-party apps that are published to the Teams app store become automatically available in Teams. You can only set this option if you allow third-party apps.
Under Blocked apps, add the apps you want to block across your organization. In a Microsoft 365 Government - GCC deployment of Teams, all third-party apps are added to this list by default. For any third-party app you want to allow in your organization, remove the app from this blocked apps list. When you block an app org-wide, the app is automatically blocked for all your users, regardless of whether it's allowed in any app permission policies
Click Save for org-wide app settings to take effect.

As mentioned earlier, to allow third-party apps, you can either edit and use the global (Org-wide default) policy or create and assign custom policies.

FAQ

Working with app permission policies

What app interactions do permission policies affect?

Permission policies govern app usage by controlling installation, discovery, and interaction for end users. Admins can still manage apps in the Microsoft Teams admin center regardless of the permission policies assigned to them.

Can I control line of business (LOB) apps?

Yes, you can use app permission policies to control the rollout and distribution of custom (LOB) apps. You can create a custom policy or edit the global policy to allow or block custom apps based on the needs of your organization.

How do app permission policies relate to pinned apps and app setup policies?

You can use app setup policies together with app permission policies. Pre-pinned apps are selected from the set of enabled apps for a user. Additionally, if a user has an app permission policy that blocks an app in their app setup policy, that app won't appear in Teams.

Can I use app permission policies to restrict uploading custom apps?

You can use org-wide settings on the Manage apps page, or app setup policies to restrict uploading custom apps for your organization.

To restrict specific users from uploading custom apps, use custom app policies. To learn more, see Manage custom app policies and settings in Teams.

Does blocking an app apply to Teams mobile clients?

Yes, when you block an app, that app is blocked across all Teams clients.