Mac Mojave Hardware Acceleration Apps Stopped Working

To get the latest features and maintain the security, stability, compatibility, and performance of your Mac, it's important to keep your software up to date. Apple recommends that you always use the latest macOS that is compatible with your Mac.

Learn how to upgrade to macOS Big Sur, the latest version of macOS.

So I was a bit too confident about that. Although the card is showed as being metal compatible under high sierra there is apparently no official support for Quadro 4000 under Mojave. It seems to works fine at first but hardware acceleration is simply not working. Bluetooth connection not working on macOS 10.14 Mojave is a known issue too. The symptoms look like your Mac just wouldn’t connect to Bluetooth, or in some cases, refuse to turn itself off. To address this injustice, it’s recommended to delete the Bluetooth plist file — don’t worry it will recreate itself upon the next Bluetooth launch. When Safari’s not working, move that.plist back to the Preferences folder; If you still have problems with launching Safari or Safari crashing, please contact or set-up an appointment with an Apple Genius or Support. We hope that you don’t have any hardware problems such as a failing boot drive.

Check compatibility

If a macOS installer can't be used on your Mac, the installer will let you know. For example, it might say that your Mac doesn't have enough free storage space for the installation, or that the installer is too old to be opened on this version of macOS.

If you want to check compatibility before downloading the installer, learn about the minimum requirements for macOS Catalina, Mojave, High Sierra, Sierra, El Capitan, or Yosemite. You can also check compatible operating systems on the product-ID page for MacBook Pro, MacBook Air, MacBook, iMac, Mac mini, or Mac Pro.

Make a backup

Before installing, it’s a good idea to back up your Mac. Time Machine makes it simple, and other backup methods are also available. Learn how to back up your Mac.

Download macOS

It takes time to download and install macOS, so make sure that you're plugged into AC power and have a reliable internet connection.

These installers from the App Store open automatically after you download them:

macOS Catalina 10.15 can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks
macOS Mojave 10.14 can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion
macOS High Sierra 10.13 can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, Lion

Your web browser downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. Open the disk image, then open the .pkg installer inside the disk image. It installs an app named Install [Version Name]. Open that app from your Applications folder to begin installing the operating system.

macOS Sierra 10.12 can upgrade El Capitan, Yosemite, Mavericks, Mountain Lion, or Lion
OS X El Capitan 10.11 can upgrade Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard
OS X Yosemite 10.10can upgrade Mavericks, Mountain Lion, Lion, or Snow Leopard

Install macOS

Follow the onscreen instructions in the installer. It might be easiest to begin installation in the evening so that it can complete overnight, if needed.

If the installer asks for permission to install a helper tool, enter the administrator name and password that you use to log in to your Mac, then click Add Helper.

Please allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart, show a progress bar, or show a blank screen several times as it installs both macOS and related updates to your Mac firmware.

Learn more

You might also be able to use use macOS Recovery to reinstall the macOS you're using now, upgrade to the latest compatible macOS, or install the macOS that came with your Mac.

Before you begin, make sure to back up your iMovie libraries, your media, and the iMovie app.

Try these troubleshooting steps in order

After trying each step below, test iMovie again to see if you've fixed your issue.

Restart your Mac

Reset NVRAM

If you use an external device with iMovie like a camera, reset NVRAM:

Shut down your Mac.
Disconnect all external devices other than your keyboard and your mouse.
Reset NVRAM.
Open iMovie and attempt to reproduce your issue.
- If iMovie works, reconnect devices one at a time until you can reproduce your issue. Restart your Mac after reconnecting a device if the device requires it.
- If iMovie still doesn't work, you might need to update your device's firmware or have the device serviced.

Update macOS and iMovie

Choose Apple menu  > App Store, then click Updates. If an iMovie update is available, click Update to download and install it.

Check camera and media format compatibility

Make sure you're using a camera and media format that works with iMovie. If you can't find your camera listed or need further assistance, contact the manufacturer of the device for support.

If you're using a third-party video interface with your Mac, check with the manufacturer for firmware or other software updates for your device.

Test with a new library and project

You can create a new library and test project to check if the issue is with your library, project, or iMovie app. First, create a new library:

Quit iMovie.
While you press and hold the Option key, click the iMovie app in the Dock or double-click the iMovie app in the Applications folder.
In the Open Library window, click New to create a new library.
Name the test library 'Test iMovie Library,' then save it to the Desktop.

Next, create the test project using a built-in trailer template, then export it as a QuickTime video file:

In iMovie, click Projects to return to the Projects view.
Choose File > New Trailer, click the Action trailer template, then click Create.
Choose File > Share > File, click Next, name the file 'Finish Line,' then save the video file to the Desktop.