Your MacBook may be slower because of these reasons: 1. The hard drive on the MacBook is full --- At this time, you only need to clean up the junk files on your hard drive. If you feel that it is a cumbersome task to manually find junk files, you can download the Mac cleanup tool to clean it up. I recommend you use iMyMac's Mac Cleaner. This software is relatively small and cleaned up. 2. Your macOS is too old --- Update to the latest version of macOS. 3. The startup is slowing you down --- You can manage your Startup Items. 4. Run too many programs in the background --- End the process using the Activity Monitor. 5. Your Mac hardware is too old --- You can consider upgrading your MacBook hardware. 6. Too many things on the desktop are still messy --- Clean up your MacBook's desktop and organize the files on your desktop into separate folders. 7. There are a lot of useless extensions in the browser --- Quickly remove the browser extension to make your Mac run faster. 8. There are a lot of outdated cache...

It's possible that these take up your other storage: 1. Large and unneeded documents 2. System and temporary files 3. Cache file 4. Application plugins and extensions 5. Disk image and archive You can see how this article solves this problem: '''How to Clean up Other Storage on Mac?'''

When your Mac has been used for a long time. If you do not clean the junk files on Mac often, your Mac's startup disk space will be filled. At this time, you only need to clean up your Mac to solve this problem. You can clean up your startup disk space based on the following ten aspects. 1. Remove old iOS backups 2. Remove iOS software updates 3. Remove unnecessary applications 4. Clean up the cache file on Mac 5. Delete unnecessary language packs 6. Delete the old iTunes library backup 7. Clean up your photo library 8. Clean up your downloads, movies, and music folders 9. Clean up your desktop 10. Empty out the trash can   If you find it difficult to clean these ones manually, you can download some Mac cleanup tools (such as my recently used iMyMac's Mac Cleaner software) to help you clean up these things. Read More：'''Startup Disk Full on Mac, Full Solution in Here!'''

You need to understand what is taking up all of startup disk space on your Mac. Then clean up your startup disk space based on the following ten aspects. 1. Clean up the cache file on Mac 2. Delete unnecessary language packs 3. Delete the old iTunes library backup 4. Remove old iOS backups 5. Remove iOS software updates 6. Remove unnecessary applications 7. Clean up your photo library 8. Clean up your downloads, movies, and music folders 9. Clean up your desktop 10. Empty out the trash can If you find it difficult to clean these ones manually, you can download some Mac cleanup tools (such as my recently used iMyMac's Mac Cleaner software) to help you clean up these things. Read More：'''Startup Disk Full on Mac, Full Solution in Here!'''

You can minimize memory usage in the following five areas. 1. Clean up your desktop. A clean and tidy desktop not only allows you to look good and relax but also reduces memory usage. 2. Although extensions in web browsers can very helpful for us to use. But sometimes there are some extensions that you won't use for a long time. Why not consider deleting some unnecessary browser extensions at this time? Removing some unused browser extensions can also reduce the use of memory. 3. Delete junk files. When your Mac has been used for a long time, you should find that your Mac has a lot of files that you haven't used for a long time, especially if the large files are especially memory-intensive. There are also old iOS and iTunes backups, cache files and browser caches, duplicate photos and files, and software that hasn't been used for a long time. These are also very memory intensive. To remove these junk files, I suggest you use some Mac cleaning tools. For example, iMyMac's Mac Cleaner. 4. Do not open too...

All Macs begin to slow down with age — MacBook Pro, iMac. It doesn’t matter. I've listed some of the reasons below that may cause the Mac to slow down and found several ways to make your Mac faster. You can try. 1. Clean up your hard drive 2. Update your macOS. 3. Manage your Startup Items 4. End processes with Activity Monitor 5. Upgrade your hardware 6. Use the Mac cleanup software. Such as Mac Cleaner of iMyMac 7. Plow through your desktop items and Clean the desktop 8. Remove extensions to make your Mac run faster 9. Clean lots of outdated cache files 10. Finder uses too much memory and Adjust Finder preferences 11.Animations and rich graphics are extremely resource-hungry. So cut down on animations 12. Reset SMC to factory settings 13. Too much temporary files in memory. So restart your Mac regularly 14. Turn off the FileVault encryption 15.Over time, permission problems occur, causing your Mac OS X to lag, freeze and even crash. Then You can repair disk permissions. 16. Clean up Downloads and Trash...

All Macs begin to slow down with age — MacBook Pro, iMac. It doesn’t matter. I have found several ways to make your Mac faster. You can try. 1. Clean up your hard drive 2. Update your macOS. 3. Manage your Startup Items 4. End processes with Activity Monitor 5. Upgrade your hardware 6. Use the Mac cleanup software. Such as Mac Cleaner of iMyMac 7. Plow through your desktop items and Clean the desktop 8. Remove extensions to make your Mac run faster 9. Clean lots of outdated cache files 10. Finder uses too much memory and Adjust Finder preferences 11.Animations and rich graphics are extremely resource-hungry. So cut down on animations 12. Reset SMC to factory settings 13. Too much temporary files in memory. So restart your Mac regularly 14. Turn off the FileVault encryption 15.Over time, permission problems occur, causing your Mac OS X to lag, freeze and even crash. Then You can repair disk permissions. 16. Clean up Downloads and Trash folders 17. Clean up Preference Panes I hope the above method can help you.

I've listed some of the reasons below that may cause the Mac to slow down. You can follow the content below to check if these problems are causing your computer to slow down. 1. Clean up your hard drive 2. Update your macOS. 3. Manage your Startup Items 4. End processes with Activity Monitor 5. Upgrade your hardware 6. Use the Mac cleanup software. Such as Mac Cleaner of iMyMac 7. Plow through your desktop items and Clean the desktop 8. Remove extensions to make your Mac run faster 9. Clean lots of outdated cache files 10. Finder uses too much memory and Adjust Finder preferences 11.Animations and rich graphics are extremely resource-hungry. So cut down on animations 12. Reset SMC to factory settings 13. Too much temporary files in memory. So restart your Mac regularly 14. Turn off the FileVault encryption 15.Over time, permission problems occur, causing your Mac OS X to lag, freeze and even crash. Then You can repair disk permissions. 16. Clean up Downloads and Trash folders 17. Clean up Preference Panes...

When I use your MacBook for a while, I will find it runs very slowly. At this time I need to clean up its storage space to improve the running speed. Here's how to do this! You can clean up your storage space in a few ways: 1. Clean up the cache 2. Uninstall applications that are not in use 3. Delete old email attachments 4. Empty the trash can 5. Delete large files and old files 6. Delete old iOS backups 7. Erase language files 8. Delete old DMG and IPSW 9. Remove duplicates 10.Organize your desktop In fact, cleaning up separately according to the above is a very troublesome thing, so I recommend you can use the Mac Cleaner under the iMyMac website to clean up. It combines the above ten functions with one software. This is a piece of software that I have used recently to clean up my Mac.

There are several ways to clean up your Mac: 1. Sort all files by size and delete old large files. 2. Use third-party software for cleanup. For example, I recently used the iMyMac Mac Cleaner software. 3. Empty your trash can 4. Uninstall the application you are not using 5. Clean up huge iTunes backups for iPhone or iPad 6. Clear temporary files 7. Find and delete duplicate files 8. Delete language files 9. Clean up large attachments in Mac Mail 10. Clean up the download folder 11. Use the storage tools in macOS High Sierra