1. Mac Will Not Update To High Sierra
2. Mac Will Not Update To Catalina
3. My Mac Will Not Update
4. Mac Will Not Update Apps
5. Mac Will Not Update
6. Mac Will Not Update Request Timed Out

Outlook for Mac provides Exchange connectivity in a Mac environment. It facilitates offline working in an Exchange environment. Outlook for Mac facilitates offline working in an Exchange environment. Synchronization between the server and client application is done so that whenever there is any modification in the Server-side or client-side, the change gets updated on the other side. Sometimes, this synchronization process gets affected partially or fully. Due to this, mailboxes are not updated on the server-side as well as on the client-side.

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Prominent Reasons Behind this Synchronization Issue

Many Outlook for Mac users face this issue, and so we need to realize the causes behind it. We have stated them here:

• Offline Mode: Your Outlook for Mac is in offline Mode
• Failed to Connect: You failed to connect Outlook for Mac with the Exchange Server
• Cache Issue: Your Outlook Cache is corrupted
• Settings: Settings are not accurately configured

Now, as you have got the main reasons behind the issue, we will provide you some ways to get out of this issue.

1. Check Offline Mode
   It is the most basic check that you can perform before pursuing any other method. Go to the Outlook menu and check if the Work Offline option is selected or not. If selected, unselect it and check if the synchronization is better now.
   
2. Rebuild the Outlook for Mac File
   To fix this issue, you should perform the troubleshooting as explained here.
   Firstly, close all the Outlook for Mac related processes currently running on the system. Take a backup of the Identities folder of Outlook for Mac in C drive. Then click on Outlook application with Alt key on hold to start the Microsoft Database Utility app. Here, select the identity which you want to recreate and click the Rebuild option to create it. Wait until the process gets completed.
3. Clear Cache in Outlook
   This method works when any specific folder is not synchronizing, but the rest of the Exchange folders are synchronizing with the Outlook. Here is the fix.
   First, ensure that there is a connection between Outlook for Mac and Exchange Server. Right-click on the respective Exchange folder which is not synchronizing and click on the Properties option. Now, switch to the General tab and click on the option Empty Cache. Next, check if the folder is synchronized and new items are received in it.
4. Confirm Exchange Connectivity
   The issue can be due to error in connection of Outlook with the correct Exchange Server. You should check it once to confirm if this is the issue. Follow this process:

   Go to Tools > Accounts in your Outlook for Mac and check over the Exchange Account. If there is an orange indicator against the added Exchange account, then it means there is some issue with it. You can try disconnecting it and re-configuring it. Try connecting it with Outlook on the web and check the status of Exchange Server now. If everything is fine, connect the desired server again.
   

The above methods are easy and can solve the synchronization issue between Outlook for Mac and Exchange Server. You can give these solutions a try and get rid of that unwanted situation quickly.

How to Retrieve Inaccessible Outlook for Mac Data?

If you are still not able to fix the issue with your Outlook for Mac data file, you can think of converting the OLM file to PST and recover its data. For this, we bring the most promising OLM Converter tool – Kernel for OLM to PST Converter tool, which converts OLM file to Outlook 2019, 2016 & 2013. It also allows users to make secure migration from OLM to Exchange Server and cloud-based platform of Office 365. The tool provides many filter options for users to move only specific data to the destination. Also, it provides complete support to all Outlook for Mac versions including Outlook 2016 for Mac. Kernel for OLM to PST provides the easiest way to retrieve the inaccessible Outlook for Mac data.

You may better understand the OLM to PST conversion process by going through the steps of the tool.

1. Run Kernel OLM to PST Converter and use Browse or Search (for automatic search in the selected system drive) option to add the desired number of OLM files for conversion purposes. Click Next.
2. After scanning the files, select any mailbox item and view its preview. Now, click the Save option.
   Note 1: You can save file items in multiple formats by right-clicking and selecting the required option.
   Note 2: With the Find option on the Toolbar, you can perform a deep search for any mailbox item using multiple filters and options.
   
3. Choose PST File (MS Outlook) option. Click Next.
4. Add filters like email metadata (From, To, Subject), Item Type, and Date Range as required and click Next.
   
5. To manage the converted PST file size, you can use the Split option and also can add a prefix to the store name.
   
6. Browse and add the saving path location for the converted PST file and click Finish.
7. The conversion process will get started and soon completes with a confirmation message.
   So, conversion of OLM to PST file is quite handy with the Kernel OLM to PST Converter software. You can now access these PST files in Outlook.

Final Words

Due to the Exchange synchronization issue, Outlook for Mac users may not have the updated information in their mailboxes. This issue can be fixed in many ways – by checking offline mode, rebuilding the Outlook for Mac file, clearing Cache in Outlook, confirming Exchange connectivity, etc. However, if all these methods fail to fix the issue, they can think of recovering Outlook for Mac data using an OLM to PST converter. It is the most reliable way to fix all Outlook for Mac issues.

More Information

Summary: This post is about how to fix when Mac won't boot after macOS update. If macOS Big Sur or macOS Catalina update makes your Mac not booting up, you'll know why and how to fix it quickly and easily.

Apple releases macOS and software updates periodically for better user experience. However, it backfires when your Mac won't boot after macOS update. Especially for some Mac newbies, Mac not turning on would drive them crazy.

Hence, this post will walk you through this problem. Then, you'll know what to do when Mac gets stuck on the Apple logo.

All right. Let's begin with why your Mac is not booting up after the macOS update.

Why is the Mac not turning on after macOS update?

Why won't Mac update successfully? It's fair enough to say, most of the time, Mac won't turn on after macOS update because of software incompatibility and bugs.

As we all know, technology inspires new programs and hardware to be released constantly. So, your Mac needs to update to work with most software and hardware. Sometimes, it's an overall macOS update. And sometimes, it's a tiny patch like this.

In detail, a macOS update could involve those activities.

1. Upgrade certain necessary drivers. Sometimes, it simply installs patches to fix bugs. But sometimes, it will replace the whole driver structure to better use hard drives, keyboard, mouse, microphone, camera, etc.
2. Upgrade the Kernel programs. Such updates will improve the security, accessibility, and management of core data.
3. Redesign or update certain built-in applications. Utilities like Disk Utility, Safari, and Mail come along with the operating system. So, it could be updated for a better user experience.
4. Other updates like operating system structure, file system, user interface, etc.

These updates are usually for a better user experience. Or they are for better supporting most of the latest hardware and software. However, as it is pointed out, the updated macOS can only work 'most' of them.

For example, Nvidia GTX 750 Ti can't work with Mac OS X earlier than Yosemite. After such a software update, Mac is not worknig, or the Mac or MacBook gets stuck on a loading bar after update. Once the third-party software and hardware on your Mac won't work with the latest macOS, your Mac won't turn on，or appears a pink screen on your Mac.

Common boot problems after macOS update

macOS is an improved range of Mac operating systems after Mac OS X. Up to now, there are three macOS systems available: macOS High Sierra, macOS Mojave, and macOS Catalina. Nevertheless, updating to each of them could cause problems.

1. Mac won't turn on after macOS Big Sur update

The newest major release of Mac operating system is macOS 11 Big Sur, which now is in beta version. Up to now, known boot issues of macOS Big Sur Beta include the following, or more.

• If you updated to macOS Big Sur 11.0 but not the newest vesion that has fixed existing bugs.
• You choose a wrong startup disk after installing macOS Big Sur 11.

A Complete List of macOS Big Sur Problems and Solutions

It talks about macOS 11 Big Sur update problems including downloading, installing, apps not working, not booting, battery issues and so on. Read more >>

2. Mac won't boot after macOS Catalina update

Then it comes to macOS Catalina. Even though it should be better than the previous two, (In some aspects, it is.) Catalina update problems like Mac won't boot after macOS update still occur.

Except for APFS conversion, the macOS Catalina update will automatically divide your hard drive into two volumes. One is the read-only Macintosh HD system volume, and the other is Macintosh HD - Data for saving your files. But if there is not enough free space for an update, your Mac will get stuck on a update loop.Whta's worse, you might see the Mac folder with question mark at startup because macOS Catalina update is not found.

What's more, the 'Full Disk Access' permission might be a lion in the way for some unauthorized applications. For instance, you have a program that requires certain Kernel extensions. But after updating to macOS Catalina, this program can't access the Kernel resource anymore. It doesn't have permission. As a result, your Mac will be frozen at the loading bar because this program keeps asking for resource permission.

A Complete List of macOS Catalina Problems and Solutions

It talks about macOS Catalina problems including downloading, installing, apps not working, not booting, battery issues and so on. Read more >>

3. Mac won't restart after macOS Mojave update

macOS 10.14 Mojave is coming after 10.13 High Sierra. Thus, the same boot problems on macOS High Sierra could also happen to macOS Mojave. As you might know, Apple introduced the System Integrity Protection (SIP) feature since OS X EI Capitan. It was originally introduced to keep system security. But once this feature was disabled previously before you update to macOS Mojave, it could cause boot problems.

For example, the Google software update on September 23, 2019, was shipped with a bug. This flaw damages the macOS file system on computers where System Integrity Protection is disabled. Many video professionals reported that their Mac crashed due to this.

So, just think about it, even Google can't avoid such software conflict, how about other third-party software? That's one of the reasons why many users who disabled SIP previously get Mac crashed after installing macOS Mojave.

4. Mac won't boot after macOS High Sierra update

One of the major updates in macOS High Sierra is the introduction of the Apple File System (APFS). As a part of the upgrade process, the macOS High Sierra installer will automatically convert the SSD to the APFS file system.

Even though Apple claims that the conversion process is supposed to be risk-free, many Mac users still meet problems. And disk corruption during the update is one of them. In this case, it's sure that the Mac won't restart after update. Mac will stop loading after update for such corruption.

Except for hard drive corruption, hardware or software incompatibility is another major reason. As your computer needs to work with so much hardware and software, the in-between conflict is inevitable. Those incompatibilities could slow your Mac down. They could make your Mac not responsive. Or, the Mac won't let you log in with right password. Also, the Mac could freeze on a black or Mac white screen of death.

• Recover/reset your forgotten Mac password to enter your macOS

What to do if Mac can't turn on after macOS update?

Having discussed why Mac won't boot after macOS update, you may find that it's tricky to hit the point. But don't worry, here are some inspirations so that you can troubleshoot this issue step by step:

• 1. Check if the Mac hard drive is corrupted
• 2. Check if any program is not compatible with your macOS
• 3. Check for a hardware incompatibility

Step 1: Check and repair the Mac hard drive in macOS Recovery mode

If your Mac refuses to boot after the update, you should check the Mac hard drive. Chances are that your MacBook ran out of power and the APFS reformatting process was interrupted. Or the hard drive is corrupted for bad sectors.

Mac Will Not Update To High Sierra

• How to Boot into & Use M1 Mac Recovery Mode

In this case, you can try to repair the hard drive with Disk Utility under Recovery Mode. Disk Utility helps Mac boot up in some ways sicne it's the built-in free disk repair tool on your Mac.

Learn how to run First Aid on the startup disk and repair the file system or disk errors.

If no disk error was found by Disk Utility, then the hard drive should not be responsible for this issue. To find out why you can't turn on your Mac after macOS update, you can try Safe Mode.

Step 2: Boot your Mac into Safe Mode

You may be wondering 'why should I do this in Safe Mode?' The reason is that Safe Mode will only launch some basic necessary programs at startup. It’s easier to isolate incompatibility software that makes your Mac unbootable.

Make sense, right? Then let's dive into details on how to do this.

• 1. Press and hold the power button until the Mac forcibly shuts down.
• 2. To start the Mac up in Safe Mode, restart this Mac with Shift key pressed and held.
• 3. Release the key when you see the progress bar.

If you boot into Safe Mode successfully, you'll see Safe Boot at the right top. At least, it indicates that the macOS update is not failed. Then, it should be third-party software incompatibility.

But to figure out exactly which program makes your Mac unbootable, you need to reboot into Verbose Mode. Verbose mode allows you to see what's happening when macOS is starting up.

You can hold Command + V at startup. Then you'll see a live report when your Mac is booting up. Once you find out the culprit, you can simply uninstall the software in Safe Mode

But if you fail to boot into Safe Mode, it means it's a macOS update failure. The system data is damaged or broken. You need to reinsall the macOS in macOS Recovery mode. You can simply boot into macOS Recovery Mode and choose Reinstall macOS. If you don't want to update macOS anymore, you can try your luck with using APFS snapshot to recover your system.

The point is that macOS reinstallation will risk your data on the Mac. Thus, you should first check your backups. Or you can recover data from unbootable Mac first.

Learn how to get your important files off the startup disk when your Mac won't boot.

Mac Will Not Update To Catalina

Tips: You can prevent APFS conversion with start to install this time if you want to avoid unnecessary problems. But you are not advised to unless you are a Mac command geek.

Step 3: Ask Apple repair store for help

My Mac Will Not Update

The toughest thing is that your hard drive is fine. And there is no software incompatibility noticed in Verbose Mode. In this case, you should check the hardware inside your Mac.

The reason is that macOS updates are always for better supporting the latest software and hardware. So, the hardware or drivers on your Mac may be too outdated to work with the newer OS.

In this case, you can ask help from the Apple repair store and reset the Mac. If it's the Mac machine itself is too old, you should replace it with a newer Mac model. Or you simply don't allow automatically update the macOS.

How to avoid macOS update failure?

Mac Will Not Update Apps

Every time there is a new macOS update available, you'll receive a notification. It asks 'Do you want to restart to install these updates now or try tonight?'. However, it's not safe to update directly because your Mac could get stuck on update or even lose important files. In case the Mac won’t boot after macOS Big Sur or Catalina update, you surely can do some preparations in advance.

Mac Will Not Update

• Read several reviews from tech enthusiasts to learn problems when a new macOS beta is released.
• Make sure your Mac model and its hardware work with the updated macOS.
• Read macOS update instructions carefully when you are up to update your system.
• Back up your files, photos, documents, etc.
• Make sure there is enough free disk space for macOS update.
• Make sure your Mac is connected to power to avoid the black screen of death during macOS update.

Mac Will Not Update Request Timed Out

So, you'd better do these preparations before you update to any operating system. But if your Mac can't boot up already, you should calm down and follow this guide to fix this issue. If you have any more any feasible solution to enrich this article, kindly drop us a hint at [email protected]