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When you start up in Safe Mode your Mac will not load startup items and some software. The mode also performs a check of your startup disk so it should be able to alert you to problems. Read about starting your Mac in Safe Mode here. After shutting down your Mac wait 10 seconds and then press the power button. As soon as your Mac starts you may hear a start up chime press and keep holding the Shift key.

Once you see the Apple logo you can stop pressing Shift. This volume which is normally hidden can be used to boot from if you need to do things like repair the startup disk, reinstall MacOS and more. It can take a while to finish booting up. Once it has you will see a desktop with a window containing Utilities open. Once you have run though these steps you should have a clearer idea about the nature of your issue. Read on to find out how to fix it.

There are a number of reasons why your Mac might not turn on. If once you have checked that it is plugged in, made sure that there is power going to the screen, and that the brightness on the screen is turned up, you can follow these How to fix a Mac that won't turn on tips to fix the problem. You may see a flashing question mark or simply a blue or grey screen.

We look at both of those occurrences below. But before you panic, there may be another explanation, and you may be able to fix it.


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Fixing this issue will involve putting your Mac into Recovery Mode and choosing the correct startup disk which is likely to be your Macintosh HD, unless you want to boot from an external drive. If you follow the tips in this article: How to fix a Mac with a flashing question mark you will hopefully be able to help your Mac find, or fix, the startup disk.

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A blank grey screen may indicate that there is a problem with a firmware update. A grey screen with an Apple logo in the middle may suggest that there is a problem with some software. In the former case you need to ensure that your Mac firmware is up to date and that should be a simple case of checking that you are running the latest version of MacOS. To actually start up your Mac so that you can check this you need to start in Safe Mode and having done so you may find that if your Mac is restarted it starts up fine the next time.

We describe how to start up in Safe Mode below. We describe how to do that below. If you see a blue screen, or a blue screen with a spinning beachball this may indicate that there is a problem with your software or a startup item. You will need to start your Mac in Safe Mode. We describe how to do this above. We have an article on what to do to fix a Blue Screen of Death on a Mac here.

Disk Utility had a bit of a makeover in OS X El Capitan and as a result the way that you repair a disk has changed slightly.

Tips: Top 3 Solutions to Preview Not Working on Mac

The steps you need to take will depend on the version of MacOS you are running. If Disk Utility is unable to repair the drive, or it believes that the disk is about to fail it will warn you.


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  • Read this article on backing up your Mac. In older versions of Disk Utility you will see that the Repair Disk option is greyed out. In this case you need to start up in Recovery Mode and repair the disk from there. Note if you have a Fusion Drive things are even more complex. However, there may be an issue with an apps that is stopping your Mac from being able to close.

    In this article, we are going to show you a few common reasons and fixes to help you tackle the Finder problem. Note: to make it easier for you, we break down the solutions into two situations see below. This scenario applies to those of you who can use Finder to open folders or access files, but the process becomes much slower than usual. Here are the common causes and solutions. Otherwise, your Mac may suffer performance issues. To check storage usage, click on Apple logo on the top left of your screen, and select About This Mac , then click Storage tab.

    Here you get a quick overview of the storage via the colorful bar. You can also use this app to find duplicate files if you are used to storing multiple copies of backups and photos on your Mac. Bottom line? Clean your Mac as much as you can to reclaim more free disk space, as this helps improve the overall performance of your Mac.

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    Plus, the Finder slow issue can disappear too. This usually happens when your Mac has updated to a newer macOS e. Other times when you just finished transferring a large number of files from an external drive to your Mac. In this case, the Spotlight often needs to index all new files for you to search.

    However, the process usually takes quite a while to complete. During the Spotlight indexing process, your Mac is likely to run slowly, heat up, and the Finder app will lag as well. How to know if Spotlight is indexing files? Learn how to do that with the step-by-step instructions MacObserver introduced. In some cases, the preferences files associated with the Finder app could corrupt or break — causing Mac Finder to misbehave. To fix that, the best way is to delete Finder Preferences.

    Fortunately, it is generally an easy fix as long as you pinpoint the culprit. However, the process may not be as easy as it sounds. In this article, we are going to show you a few common reasons and fixes to help you tackle the Finder problem.

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    Note: to make it easier for you, we break down the solutions into two situations see below. This scenario applies to those of you who can use Finder to open folders or access files, but the process becomes much slower than usual. Here are the common causes and solutions. Otherwise, your Mac may suffer performance issues. To check storage usage, click on Apple logo on the top left of your screen, and select About This Mac , then click Storage tab.


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    • Here you get a quick overview of the storage via the colorful bar. You can also use this app to find duplicate files if you are used to storing multiple copies of backups and photos on your Mac. Bottom line?

      Best Alternative to Solve Preview not Working Issue

      Clean your Mac as much as you can to reclaim more free disk space, as this helps improve the overall performance of your Mac. Plus, the Finder slow issue can disappear too. This usually happens when your Mac has updated to a newer macOS e. Other times when you just finished transferring a large number of files from an external drive to your Mac. In this case, the Spotlight often needs to index all new files for you to search. However, the process usually takes quite a while to complete.

      Fix TL;DR version:

      During the Spotlight indexing process, your Mac is likely to run slowly, heat up, and the Finder app will lag as well. How to know if Spotlight is indexing files? Learn how to do that with the step-by-step instructions MacObserver introduced.