DiskWarrior 5.2 has limited support for macOS Mojave, allowing the rebuilding of external drives formatted with HFS +.APFS formatted drives can be recognized by DiskWarrior, but can’t be rebuilt. You may also need to allow the DiskWarrior app or system extension to run using the method shown in the “How to Fix Apps That Crash in Mojave” section.
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 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
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:
- 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:
Open Mission Control
- Swipe up with three or four fingers on your trackpad, or double-tap the surface of your Magic Mouse with two fingers.
- Open the Mission Control app, which is in your Applications folder.
- Press the Mission Control key on your Apple keyboard or Touch Bar.
Add spaces and switch between them
The Spaces bar at the top of the Mission Control window contains thumbnails of each desktop space and each window that is in full screen or Split View.
To add a space, move your pointer to the Spaces bar, then click the add button on the right:
When you have multiple spaces, you can switch between them by clicking the thumbnails the top of the Mission Control window. Or use these methods, which work even when you're not in Mission Control:
- Swipe left or right with three or four fingers on your trackpad, or swipe left or right with two fingers on your Magic Mouse.
- Press Control–Right Arrow or Control–Left Arrow on your keyboard.
Move windows to spaces
Mojave App Store
When you have more than one space, you can move windows to and from each space. Just drag the window onto the other space's thumbnail in the Spaces bar.
If you drag a window onto an empty area of the Spaces bar, that window opens in full screen in its own new space:
If you drag a window onto the thumbnail of a full-screen app, that window joins the other window in Split View:
Move or remove spaces
Where Did Apps Go Mac Mojave 2
To move a space, drag its thumbnail to the left or right of another space in the Spaces bar.
Download Mojave App
To remove a space, press and hold the Option key, then click or next to the space's thumbnail in the Spaces bar. Any windows in that space then automatically move to your first desktop space.