Mail App Keeps Freezing Mac Rating: 8,2/10 763 reviews
Hello and welcome to Apple Support Communities staylorinoz,
If I'm understanding your post right, the Mail app freezes on your Mac when you create a new message and address it to a recipient that isn't in your contacts. I know how disruptive it can be to experience complications with apps on your Mac, and I'm happy to help you with a solution.
Let's start with a full restart of your Mac if you haven't done so already. This is a pretty basic step, but it can be really helpful for resolving various issues. Next, reset the NVRAM using the steps here:Do you have multiple email accounts set up in Mail? If so, let’s try seeing if we can narrow this down to a particular email account. Go to System Preferences > Internet Accounts. Select one of your email accounts from the left side and uncheck the box next to Mail and then test out composing a message in the Mail app. Do this for each one of your email accounts. If the issue is resolved with Mail disabled for one of those accounts, try removing and readding that particular email account next using the steps here:
Set up Mail with your email accounts
If the issue persists, see if you experience the same thing when using Mail while booted in safe mode: macOS Sierra: Start up in safe mode After that, test out Mail in a brand-new user account: macOS Sierra: Set up users, guests, and groups on your Mac. Also, let me know at what point does Mail freeze, for example, does it freeze after you type in the email address or does it not freeze until you try to send the email message?
Thanks for using Apple Support Communities.
Take care.
  1. Best Mail App For Mac

Select all your mail account and then disable (Turn off) Mail. Enable Mail and the open Mail app. Solution 5: Restart your Mac in Safe Mode Restarting your Mac in Safe Mode will fix many issues in the Mac. But you can’t use some features in Safe Mode. Turn off your Mac via Apple menu-Shut Down. Press the Power Button to turn on your Mac. Apple's Mail app for iOS is a go-to app for many iPhone users, but some have recently encountered a number of bugs and glitches that render the Mail app useless. We list the most common Mail app. In the case of the Mail app, ‘Envelope’ files are another set of files that sometimes need refreshing to resolve the crashing issue. Please follow each of the steps below and remember to restart your MacBook. Remove Your Mail App Preference Files. If you have an instance of the Mail app running on your macOS High Sierra, exit out it. If you try all those things and continue to have crashes or freezes, contact the app’s developer (if it’s a single app) or Apple (if the problem is system-wide) for further advice and assistance.

Nov 24, 2017 2:15 PM

Although Macs are extremely proficient computers, they sometimes experience freeze ups. This can be unfortunate when you’re in the middle of something important — a work project, or a FaceTime conversation. Modern RAM-intensive applications can easily put earlier Mac models into a coma. What should users do when an app or the macOS itself stops responding to any actions? Why can OS X freeze up all of a sudden? Read on to find out the typical reasons causing this malfunction and ways to solve the problem fast!

Discover the reasons for Mac freezes and macOS glitches and next, learn what to do when something like this happens to your computer.

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  1. Unnecessary apps launched at startup.

Certain applications sneak into Mac’s login items and launch on macOS startup without you knowing. If something goes wrong, apps like this can freeze up in the background and slow down your Mac. Check the startup items and remove the unwanted programs launched on startup.

2. Multiple background processes.

A Mac app may be running several processes at once, and some of them can freeze up. Depending on your Mac’s RAM capacity, there can be too many processes hindering its overall performance. Check the Activity Monitor to see the list of app-related or system processes running in the background and the memory consumption.

3. Cluttered hard drive.

The chances are huge, your Mac’s hard drive needs serious maintenance and decluttering. Use macOS Optimized Storage toolkit to reclaim the disk space and restore system capacity. Alternatively, use third-party Mac cleaning application to find and delete trash, system junk, temporary files, and unused apps.

If your Mac freezes at login and you have no idea about what’s causing it, use a Safe Boot mode. It allows checking the functionality activated during startup and performing its diagnostics. To launch Safe Boot, turn off your Mac, then start it up holding down the Shift key.

If you wish to get feedback on how the process is going, restart the computer holding down the Shift and Command-V key combination. While the Mac is entering the Safe Boot, it’s Verbose Mode, will display messages about the Safe Boot troubleshooting stages. If your Mac successfully starts up with a Safe Boot the issue is fixed, so you can restart it normally.

If the problem persists, your Mac may be stuck in boot loops. Another reason for this to occur is a serious hardware-related issue demanding a more in-depth diagnostics.

If your MacBook Pro or Air is frozen, hold down Command + Control + Power keys to force-reboot your Mac. If you own one of the earlier MacBook models, use the same key combination, but press the Media Eject button instead of the Power key. Note: the force-reboot scenario will inevitably lead to data loss. The ‘hard restart’ can corrupt the files you were working on. Try recovering what is left and create a new file to save the important data. Actually, the same force-reboot scenario works for iMac or Mac mini as well.

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My Mac is frozen, and I can’t click anything” is a typical plea for help one can come across on Apple community forums. Most often it is related to the issue when Mac’s screen freezes and a user can’t even move the cursor around the desktop as a touchpad, mouse or a keyboard do not react. Also, the “spinning beach ball of death” may be present on the screen. It usually appears when your Mac’s hardware fails to handle the currently executed software task.

Other reasons are:

Complex tasks overloading the CPU

Memory-intensive apps

Lack of free space on Mac's startup disk

To understand what is causing the “beach ball,” a user needs to monitor the CPU usage, check the RAM consumption in Activity Monitor, and run hardware diagnostics. As you see, the spinning cursor is a symptom of a malfunction that needs close attention before your Mac fails.

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A specific app can freeze up making your Mac partly or totally unresponsive. Here’s how to close a frozen program:

Mail App Keeps Freezing Mac
  1. Try switching to another macOS area by clicking on the desktop or another app window. Alternatively, use the Command-Tab key combination to switch to another program.
  2. Locate the app icon in the Dock, then Control-click the icon.
  3. Hold down the Option key (Quit will change to Force Quit on the menu).
  4. Click Force Quit.

If force-quitting the app didn’t work, here’s another way to abort a frozen program. Hold down Command-Option-Esc to access the Force Quit Applications window. Next, select a frozen app from the list, and click Force Quit.

On older Macs, upgrading to OS X El Capitan on top of Yosemite led to system slow down and freezing. Upgrading to macOS Sierra or High Sierra from earlier versions would cause similar issues. This is why a clean macOS installation is always preferable to prevent issues down the road. Apple users wait months before installing the latest software updates to make sure they will run a stable OS version.

To fix the freezing issue caused by an OS/software upgrade, do the following:

• If you upgraded the software, use a Time Machine backup to revert to the previous state;

• If you upgraded to the latest OS version, try downgrading to the previous version, or install the new one from scratch

Best Mail App For Mac

Mac’s slow work or freeze-ups can be caused by an array of reasons. Use the ‘isolate & identify’ way of thinking to check all possible causes. Running the latest OS and software version compatible with your Mac’s hardware will help you avoid serious performance issues. Keeping your Apple computer clean and healthy will guarantee its steady work for years to come.