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.
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- Mar 16, 2018 Turn this feature off if you’d like to keep all of your apps permanently Here is the description of the feature works: Automatically remove unused apps, but keep all documents and data.
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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32-bit apps can run on a 64-bit system as they've been doing for years, but Apple wants to get rid of outdated apps to make sure everything that runs on the Mac is properly optimized and isn't an unnecessary drain on system resources.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.
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.
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.
Today we'll discuss the issue of black screen on Mac and tell you the reasons and relative solutions. When you try to wake the Mac from sleep, the iMac/MacBook screen goes black and unresponsive. Even worse, the Mac screen goes black randomly and ruins the files that you was working on. If your MacBook Pro/Air, iMac is stuck in black screen and doesn't respond, check out these solutions.
You May Need: Top 5 Data Recovery Software for Mac/PC
Why Does My Mac Go Black?
The possible reasons why Mac screen goes black could be listed as follows:
1. Battery Drain
Running out of battery is one of the most common reasons why your Mac screen goes blank. Even if your Mac is plugged in, a bad battery or a faulty cable can stop your Mac from charging and thus the Mac showsss black screen and becomes unresponsive. So the first thing you should do is to check the Mac’s battery and charging cables.
2. Display Issue
In most cases, the Macbook or iMac goes black on startup. However, the activity indicator, fan or bootup noises still work which indicates your computer has turned on. So it seems like a problem on the Mac screen.
3. Incorrect Disk Permissions
The permissions on Mac control users and system processes's access to the files. If disk permissions are incorrect, it could also make your Mac go black screen or unable to boot up.
4. Login Items
Some login items in auto startup list stop your MacBook from booting up normally.
5. Bugs in An App
A bug or a glitch in apps, especially third-party apps, could cause the blank screen. If the Mac black screen of death happens when you are using an third-party apps or you recently install a new app, the problem may be caused by the app.
5. macOS Operating System
The upgraded operating system might produce compatibility issue which might sometimes result in the black screen. Also, there are known bugs in macOS that could cause black screen of death.
We have talked about the reason of black screen. Next we would like to show you a couple of methods to fix the black screen issues on MacBook/iMac.
How to Fix Mac in Black Screen
Method 1: Check Mac's Battery
You could check things as follow:
- Check if your charger cable is undamaged and still connected.
- Check if the indicator light is on.
- Check if your Mac produces any noise from the fans or drive.
If the indicator light is off and there is no noise, your Mac probably runs out of battery. Keep your Mac plugged in and charge. When the Mac can boots up normally, check your battery cycles to see if it needs to be replaced. You could do this by following steps here.
STEP 1: Go to Apple Menu on the top left.
STEP 2: Navigate to About this Mac>System Report>Power.
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STEP 3: Check the items: cycle count and condition for your battery. If the condition is poor or bad, You’d better purchase a new battery.
If you have ruled out all the things above,then move to next method for help.
Method 2: Restart Your Mac
In most of the cases,restarting your Mac might help fix the problems. If your MacBook is in black screen, try to open and close the lid and press any key on the keyboard or touch the trackpad first. If the MacBook screen still won't light up, you could try to force restart your MacBook.
OPTION 1: Long press Power button for around 6 seconds, then wait for 15 seconds till Mac shuts down and press the Power button again.
OPTION 2: Press Control+Eject keys and if a dialog box shows, press Enter to shut down your Mac. Then press power button to restart it.
OPTION 3: Press Control+Command+Eject to force restart your Mac.
Method 3: Restart Your Mac with Spceical Keys
Some users found out a specific key sequence can get your Mac out of black screen of death quickly . Here are what you have to do:
STEP 1: Press power button once which will normally show you a shut down dialog box, however, you won't see it as you screen is black.
STEP 2: Press S key, which will put your Mac to sleep. Then long press the power button for 6 seconds.
STEP 3: Wait for 15 seconds and press power button to restart it. Your Mac screen will light up and start up normally.
You also have the option to opt-out of these cookies. Find mac version number.
Method 4: Reset the NVRAM/PRAM
If the Mac is still unresponsive and shows black screen or the Macbook Pro/Air screen goes black intermittently, you need to reset the NVRAM/PRAM to see if it works.
STEP 1: Hold power button for 6 seconds to shut down your Mac.
STEP 2: Press power button. Followed closely by holding down Command+Option+P+R.
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STEP 3: Release the keys if you see Apple logo screen or hear other startup chimes.
To learn more about resetting NVRAM/PRAM, please read Full Guide to Reset the PRAM & SMC on Your Mac.
Method 5: Disable Suspicious Login Items
Some apps would launch automatically on startup without your consent. Here, we could identify such startup apps by running MacMaster. FonePaw MacMaster is a multifunctional tool to manage apps and data on Mac. One of its feature is to check all of the built-in as well as the third-party extensions, plugins, apps on your Mac, and then enable or disable them in one single click. Let’s see the guide of disabling suspicious login items:
STEP 1: Download and install MacMaster on your computer.
STEP 2: Go to Extensions on the left and click Scan to scan extensions on Mac.
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STEP 3: After scanning, choose Login and find the apps that start at login without your permission.
STEP 4: Click the circle button beside the information of the app. If the circle turns gray, it means that the app has been successfully disabled.
Method 6: Reinstall the macOS
Black screen of death on MacBook could be associated with software issues. For this reason, we need to update all apps to their latest versions including the macOS.
However,before you update macOS,you need to make reparation as listed below:
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- Backup your Mac. You could use Time Machine to backup your Mac. iCloud or USB would be also choices to backup your Mac.
- Check up the generation of your Mac or MacBook to rule out compatibility issue.
- Free up storage space on your Mac. You could try to store data in iCloud, optimize storage,empty trash or reduce clutter to achieve the goal.
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Having done all the things above, you can download the latest version macOS Catalina, Mojave, High Sierra from the Mac App Store to reintsall the operating system. You can also clean install macOS from a bootable drive. If you have any data loss after reinstalling macOS on the computer, you can use FonePaw Data Recovery to recover photos, files, music and more.
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