Summary: Still worry about your insufficient Mac storage? Want to speed up Mac but don't know how? Get the 6 free Mac cleaners to clear disk space, clean junk or duplicate files to free up your Mac.

1. Best High Sierra Mac Cleaner Kit
2. Best High Sierra Mac Cleaner Reviews
3. Best High Sierra Mac Cleaner
4. Best High Sierra Mac Cleaners

Many of us know exactly how to clean Windows computer or Android phone, but when it comes to cleaning Mac, few people know about it. Many Apple users think that, there is no need to clean Mac.

Step 2b: Get the install file for an older version of macOS. For older versions of macOS and Mac OS X it's a bit more difficult to get the install file: Apple doesn't offer downloads of outdated.

• Clean My Mac X is available to download for FREE here. When first notice the speed and performance of your Mac decreasing, there are many solutions. By far the best is to clear the cache on Mac OS Mojave. This will provide increased storage space that can be utilized to make the Mac.
• The best Mac Cleaner software helps you to do this without iCloud. You do not have to spend additional money if you can locate free space in your Mac itself. Other reasons why you need to consider Mac cleaner software includes the removal of GBs application data that is not often used.
• After you upgrade your Mac OS to macOS 10.13 High Sierra, AweCleaner is the best tool for you to clean junk, improve performance, manage data, etc. No.5 macOS 10.13 High Sierra cleaning Software - Disk.

However, with more and more junk files occupying your Mac storage, your Mac will slow down and offer a bad performance. You have to rely on some Mac cleaner software to remove all useless data.

Best Free Mac Cleaners

With so many Mac cleaner tools offered on the market, which one you should use? Do you know how to choose a great Mac cleaner? We have tested more than 20 Mac cleaners and select the 6 best ones for you to choose from. You can pick your preferred Free Mac cleaner to speed up your Mac easily and quickly.

No.1 Free Mac cleaner: CCleaner - Free junk file cleaner

CCleaner is one free and top Mac cleaner to delete cookies, search history, temporary files and junk files from Mac. The specific functions are below:

1. Find and remove useless/junk files with the click of a button so your Mac can run faster. Speed up boot times with easy management of Startup items.

2. Clear up your recycle bin, temporary files and folders, broken permissions and others. If you want to remove installed programs, just click one button.

3. Erase your browser search history and cookies so you can browse any Internet confidentially and your identity remains anonymous.

No.2 Free Mac cleaner: Disk Inventory X – Free disk cleaner for Mac

Disk Inventory X is one disk cleaning software and disk usage utility for Mac. With this free Mac cleaner, you can know where your disk space has gone and clean it safely. Just see more about Disk Inventory X.

1. Disk Inventory X shows the sizes of files and folders in a special graphical way.

2. With this Mac cleaner, you can see different files marked with different colors, to help you easily find what you want to delete.

No.3 Free Mac cleaner: AVG Cleaner – Free hidden clutter cleaner

AVG Cleaner is one free Mac cleaner to clean hidden clutter and forgotten duplicates. You can see the detailed information below:

1. Clear more hidden garbage, log, download history and trash bin for freeing up more space on your Mac.

2. Search more duplicate files, including images, music, videos and folders.

3. Created for Mac and easy to use.

Best High Sierra Mac Cleaner Kit

4. There is an anti-virus software called AVG AntiVirus for Mac, you can use it to protect Macs on your and your families.

No.4 Free Mac cleaner: OmniDiskSweeper - Free hard drive cleaner

OmniDiskSweeper is one free Mac cleaner to find and delete big files that taking up hard drive space and also it can help you recover lost disk space.

1. OmniDiskSweeper helps you sort every file on your Mac by size and you can identify the biggest file to delete it.

2. After deleting, remaining space and folders are recalculated.

No.5 Free Mac cleaner: Dr. Cleaner – Free memory, disk, system cleaner

Dr. Cleaner is one free Mac cleaning app to offer Memory Optimization, Disk Cleaning and System Monitoring to keep your Mac optimized for the best performance.

1. Smart and accurate selection for duplicates scan and remove on Mac with OS X 10.6.6 or later.

2. Scanned big files and junk files will be deleted easily from your Mac.

3. You can easily view real-time network usage and CPU usage in the Menu bar.

No.6 Free Mac cleaner: Disk Drill

Disk Drill is one very popular free Mac cleaner app. Actually, it is a professional data recovery tool for Mac, which carries some disk cleaning functions. It has the capability to analyze Mac storage space, locate unused, large, and duplicate files and so on. In this way, it enables you to free up your Mac storage effortlessly.

1. Monitor the health of your Mac storage and offer timely alerts.

2. Find and remove duplicate files in multiple locations on Mac.

Best High Sierra Mac Cleaner Reviews

3. Analyze disk space, locate unused files and space hogs, free up storage.

Professional Mac cleaner recommendation:

With the best 6 Mac cleaner apps above, you can handily remove some junk files and optimize your Mac performance. But some of them only offer trial features. Here you are recommended to directly choose the professional Mac cleaner below:

• Scan and delete junk files including cache data and logs, email attachments, unwanted iTunes backup and app localization.
• Delete large and old documents and selectively remove worthless files.
• Clean duplicated files or folders on Mac.
• Uninstall apps and clean associated files safely.
• Monitor Mac system in disk utilization, battery status, memory performance and CPU usage.
• Compatible with iMac, Mac Pro, MacBook (Air/Pro) in the latest macOS Big Sur.

FAQs of Free Mac Cleaner

How do I clean and optimize my Mac?

Download and install Aiseesoft Mac Cleaner. Click Cleaner and you can clean up your Mac by cleaning system junk, iPhoto junk, email junk, similar photos, iTunes junk, trash bin, large & old files and more.

Why is my Mac so slow?

The reason that why is your Mac so slow may includes there is no enough hard drive or RAM on Mac. Or there is too many startup items or icon clutter on desktop. Perhaps your macOS is outdated and you should update it.

Does Catalina slow down your Mac?

No. Catalina won’t slow down an old Mac. You can check to make sure if your Mac is compatible with macOS Catalina.

By now, 6 free Mac cleaners have been shared here. You can choose your preferred Mac cleaner according to your need. Please share it in comment if you have any better Mac cleaner recommendation. Check ere if you want to speed up your slow iPhone.

What do you think of this post?

Excellent

Rating: 4.8 / 5 (based on 238 ratings)

December 29, 2020 17:50 / Updated by Louisa White to Mac Cleanup

Upgrading to the latest Mac operating system released at the Apple keynote this September can be everything you envisioned and more. If you take the time to upgrade it properly, that is. How? By performing a clean install of the macOS High Sierra.

Don’t worry, a clean install is as easy as it gets and we’ve prepared a comprehensive guide to have you upgraded and performing at maximum, in no time. But first, let’s find out why the new operating system brings to the table in terms of new, exciting features. Afterwards, we’re going to give you a complete clean install guide which you’re actually going to enjoy!

Why you should upgrade to High Sierra

MacOS High Sierra’s features are a series of elegant refinements that will improve performance and user experience, while also paving the way towards virtual and augmented reality. Here are the best upgrades:

• Safari gets faster and smarter, offering multiple customization options for users
• The file system is now more secure, with built-in encryption and crash-safe protection
• Videos look more amazing than ever, while taking with 40% less space in storage
• The Photos app brings improved professional editing tools and new synchronization options
• Metal 2 leverages more power with state-of-the-art development tools, robust graphics and an external GPU
• Siri sounds more human and even has a new talent and hobby as a DJ

Are you ready to get beta version of macOS High Sierra?

Of course, these are just a few of features macOS High Sierra brings to the table. Once you’re convinced that macOS High Sierra is the system of your dreams, go straight to the clean install!

Why opt to clean install macOS High Sierra

A clean install of macOS High Sierra will ensure the maximum performance for your Mac. The reason is pretty straight forward: by formatting your Mac drive you will eliminate all the issues accumulated over time and have a clean slate to start again.

By opting for a clean install, you will regain valuable disk space and get rid of the useless files and junk apps that were causing a slow Mac. Thus, you will both be able to enjoy all the great features of macOS 10.13 at their best and experience a faster Mac experience, reaching the top performance it should.

How to prepare your Mac for the clean install

Check macOS 10.13 High Sierra compatibility

Before you can enjoy all the new goodies from macOS High Sierra, you must answer the question: can your Mac run macOS High Sierra? Nervous? Don’t be, as the specs look quite promising. How promising? Well, you’ll be able to upgrade to High Sierra even if you own a Mac as old as 2009. Sure, the hardware might cause you some slight drawbacks and refuse to run all the features, but overall you should be able to enjoy the big refinements. Things look even brighter when it comes to newer version of Macs, which should support the new operating system without any problem whatsoever.

Go for a system cleanup and fast backup

The first step towards a clean install, is a drive format. But act with caution! Before you do anything drastic, make sure you cleanup and backup your Mac to keep your important files.

Start with a system clean-up. Okay, that’s actually an euphemism for: delete everything you don’t need, throw away any duplicates and erase all the useless data.

Don’t know how to do that exactly? Check out How to clean up your Mac for a detailed and easy way to perform a thorough cleaning.

Best High Sierra Mac Cleaner

There are going to be some important files you will want to keep. Be it files, documents, photos, movies or other apps, you’ll want to create a backup for them. Where? That’s up to you. You can choose either iCloud or any external storage device with enough space.

Now it’s time to wipe your Mac clean. But you did perform a Mac backup, right? Good! Then you can format the drive! Here’s how:

Go to Applications > Utilities and click on Disk Utility. From here, select the drive and hit Erase, as you select Mac OS Extended (Journaled) as the format type.

Before you start new life with the new macOS, get equipped with a couple of backup and maintenance tools. They will save you should something goes wrong. The good solutions are Get Backup Pro or Disk Drill.
And the last thing before we start. A new OS needs a fresh Mac, so trim down the fat on your system. Use an app like CleanMyMac X to remove all system junk, large hidden files, and old apps' leftovers.

A step by step guide to clean install macOS High Sierra

1. How to download macOS High Sierra

The new macOS High Sierra has long been available for the developers only, but now is public and available in Mac App Store.

Here is the link to download it directly: macappstores://itunes.apple.com/app/id1246284741

Make sure you download the macOS High Sierra Installer to the /Applications folder and leave its default name.

2. Create a macOS High Sierra Bootable USB Drive

A clean install wouldn’t be possible without creating a macOS High Sierra Bootable USB drive. So let’s go ahead and create one! Find an 8 GB USB stick and make sure it is formatted as GUID Partition Map and Mac OS Extended (Journaled). To check if it is, launch the Disk Utility application. It’s from here that you’ll also be able to make the needed changes, if the case.

Once you’ve done this, plug in the USB into your Mac and launch Terminal. There are 2 options for doing this: you either go to Launchpad or you can choose the Spotlight search. Next, write the following command, letter by letter:

sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/USB --applicationpath /Applications/Install macOS High Sierra.app --nointeraction

Ready? Great! Hit return, enter your admin password when prompted and them simply go along with the instructions to complete the process. In about 15 to 30 minutes you’ll have your bootable USB and you’ll be one step closer to macOS High Sierra’s world of new features.

3. Clean Install macOS High Sierra from USB Bootable Drive

Best High Sierra Mac Cleaners

You’ve got this far. Now, it’s time to actually hit the install button and leverage all the steps you’ve completed. Take your bootable USB and connect it to your Mac. To continue, restart your Mac while pressing the Option Key.

This will open the Startup Manager from where you’ll be able to start the clean install. Proceed by erasing your hard drive from Disk Utility. Once you’ve deleted this, go back to the main menu and hit install. The steps will be prompted to you on screen, and you’ll easily be able to complete the installation. Voila! Now enjoy macOS High Sierra!

There you have it! A step by step guide to clean install macOS High Sierra Bea and be among the first ones who get to explore the new exciting features. Do let us know what you think!

These might also interest you: