If you want to make duplicates of your optical disks (CD and DVD) on your Mac, you don't need to buy any expensive software. Mac users wishing to create a bootable install disk for Big Sur now need to use the createinstallmedia command in Terminal, and here’s how to do it. These instructions work to create a bootable install disk for all versions of macOS from macOS 11 Big Sur back to OS X El Capitan 10.11.

1. How To Download A Disk On A Mac Pro
2. How To Download A Disk On A Mac Hard Drive
3. How To Download A Disk On A Mac Pro
4. How To Download A Disk On A Mac Keyboard

You might be experiencing some performance issues with your Mac, and you knew from your PC days about defragging computers. Well, you won’t find any command or utility to do that on Mac. The point is that the Mac File System is designed differently than Microsoft's, and it defragments files automatically. However, there are still some situations when you may need to defrag Macbook once in a few years.

In this article, we’ll tell you how to defrag a Mac, all advantages and pitfalls of doing this, and what alternatives to defragging are out there. Anxious to find out? Then let’s start!

Do you need to defragment a Mac?

First of all, let’s find out why we do a Mac disk defrag. To cut a long story short, defragmentation aims to boost a computer’s performance by reorganizing the data on your drive. As a result, the related bits are grouped, and loading files and programs take less time. Simply put, Mac defragment moves everything back in order and can greatly speed up a slow system.

However, despite the obvious advantage, a Mac running any OS X version later than 10.2 generally doesn’t need to be defragmented. This is because OS X and macOS have their own built-in Apple Mac utilities that clean up fragmented files from the hard drive. Therefore, for most users, it eliminates the need to perform a regular defrag. But there is an exception to every rule, and in a few rare cases, a defrag for Mac can make a difference.

When do Macs need to be defragged?

If your hard drive is more than 90 percent full, the macOS may have problems with automatic defragmentation routines. This situation is common for multimedia creators who produce plenty of large files in pro tools like Adobe Premiere, Final Cut, or Photoshop.

Therefore, if you have hundreds or even thousands of large (1GB and larger) movies, audio files, or creative documents, you should consider removing them to free up the storage. Another alternative is defragging a Mac.

Concerning the first option, there is a fast and safe way to remove unnecessary files from your Mac — a powerful app CleanMyMac X. It finds above 74 GB of junk on an average computer, including old and large files, app leftovers, and system clutter. It helps to boost computer performance, so you probably won’t even need to defrag a Mac.

However, if you still wonder, “How do I defrag my Mac?” read on. We’ve prepared all the essential guidelines for you.

How to defragment a Mac

One of the simplest and most user-friendly Mac defrag methods is to use a trusted third-party defragmentation program. But before choosing and installing the app, make sure to back up your data. Should something go wrong, you’ll be able to restore all necessary files easily. You can use Time Machine, iCloud, Dropbox, or any other external storage at hand for this purpose.

When choosing the defragmentation app, pay special attention to the compatibility requirements. Macs running operating systems older than OS X 10.2 are not compatible with the latest modern defragmentation software, so finding a relevant tool is challenging.

Once you’ve installed the program of your choice, open the utility and follow the instructions of a disk defragmenter for Mac. Give the process plenty of time to complete without moving your computer anywhere until the defragmentation is finished. Usually, you’ll need to restart your Mac as well.

Will defragmentation harm my HDD?

You may not worry: OS X defrag will not harm your HDD. As you already know, disk defragmentation can greatly speed up the traditional hard drive. It’s because HDD fragments all the data and stores it in multiple locations. And it may take quite a time to read the file with its pieces situated in different places. The procedure for arranging the data is not harmful to your HDD and aims to boost the computer’s performance. And while it is not advisable to turn to such extreme measures, defragmenting a hard drive disk is a safe procedure if, of course, performed accurately.

Why you should never defrag Mac’s SSD

The process described above is applied only to the hard drives. If you have a newer Mac with SSD (solid-state drive), you should never defrag its data. SSDs operate in a different way to a traditional HDD and already have a built-in automatic maintenance process. Therefore, it is not necessary to defrag a solid-state drive to boost Mac’s performance.

Furthermore, all defragmentation attempts can even hurt your SSD. Flash memory used by a solid-state drive has a finite lifespan because of the limited write and read cycles. And disk defragmentation is a process of reading the data from one place and writing it to another. So if you defrag SSD, you will perform thousands of write operations each time on the drive. It can speed up the degradation of a solid-state drive and lead to its wear and tear. And that’s not what you need.

What are alternatives to defragment a Mac?

If your Mac is running slowly, you don’t necessarily need to defrag Mac hard drive. Sometimes it’s not your HDD that’s having problems. Therefore, try some alternative methods that may help you speed up the system without disk defrag on Mac.

Repairing Disk Permissions

“Try repairing your disk permissions” is a standard Mac troubleshooting tip. Permissions are file settings that affect the ability to read, write, and execute the file. And if they are no longer set correctly, software that uses the file may not work right.

In OS X Yosemite or earlier, the file permissions on a startup disk can be repaired with the help of Disk Utility. Driver 101 102 key or microsoft natural ps 2 keyboard. Note that beginning from OS X EI Capitan, disk permissions are automatically protected, and there is no need to verify them with Disk Utility.

How do I repair my Mac startup disk?

Here are the steps for optimizing your Mac:

1. Open Disk Utility (Applications > Utilities).

2. Choose your startup disk.

3. Click the First Aid tab.

4. Click Verify Disk Permissions to check permissions.

5. Click Repair Disk Permissions to repair any inconsistent permissions.

If you don’t want to repair disk permissions manually, you can easily perform the action with the utility we mentioned above — CleanMyMac X. It has the Maintenance module that will help you optimize your Mac, including verifying startup disk and repairing disk permissions. Thus, you’ll ensure that your Mac’s operating system is functioning properly. You can download CleanMyMac here.

Therefore, before defragging your Mac, try to perform the Mac disk cleanup to increase the disk speed. It’s an easy and risk-free process that will not take more than a few minutes.

General speedup tips

Sometimes your Mac needs a good kick-start to run smoothly. Here are some tricks to speed up your computer.

How do I improve my Mac performance?

1. Update macOS software

Try to update your software to the latest versions as it performs better than the previous ones. Usually, system updates include performance and bug fixes that could be the reason for slowdowns.

2. Delete unnecessary files

Ensure that your Mac has at least 10 percent of total drive storage available at any time to perform background actions and provide enough space for temporary files, caches, and virtual memory. Once again, CleanMyMac X is a great solution for finding and removing useless and large files that take gigabytes of space on your Mac.

3. Stop programs from launching automatically

A large number of apps may launch simultaneously when you turn your Mac on. Some of them run in the background and are only visible in a menu bar, so it’s even hard to define if they’re actually running. You can stop them from loading by opening System Preferences, clicking on Users & Groups, and choosing Login Items. You’ll see a list of applications that launch during the startup. You can switch off the ones you don’t need by clicking the minus sign (-) button.

If you’re looking for some utilities that can help with all of that and even more, try Mac maintenance software like CleanMyMac X, It will optimize Mac performance safely and quickly.

We hope this article was helpful, and you found the answers to all your questions here. Thanks for reading and share this article if you liked it!

How To Download A Disk On A Mac Pro

These advanced steps are primarily for system administrators and others who are familiar with the command line. You don't need a bootable installer to upgrade macOS or reinstall macOS, but it can be useful when you want to install on multiple computers without downloading the installer each time.

What you need to create a bootable installer

• A USB flash drive or other secondary volume formatted as Mac OS Extended, with at least 14 GB of available storage
• A downloaded installer for macOS Big Sur, Catalina, Mojave, High Sierra or El Capitan

Download macOS

• Download: macOS Big Sur, macOS Catalina, macOS Mojave or macOS High Sierra
  These will be downloaded to your Applications folder as an app named Install macOS [version name]. If the installer opens after downloading, quit it without continuing installation. To get the correct installer, download from a Mac that is using macOS Sierra 10.12.5 or later, or El Capitan 10.11.6. Enterprise administrators, please download from Apple, not a locally hosted software-update server.
• Download: OS X El Capitan
  This will be downloaded as a disk image named InstallMacOSX.dmg. On a Mac that is compatible with El Capitan, open the disk image and run the installer within, named InstallMacOSX.pkg. It will install an app named Install OS X El Capitan into your Applications folder. You will create the bootable installer from this app, not from the disk image or .pkg installer.

Use the 'createinstallmedia' command in Terminal

1. Connect the USB flash drive or other volume that you're using for the bootable installer.
2. Open Terminal, which is in the Utilities folder of your Applications folder.
3. Type or paste one of the following commands in Terminal. These assume that the installer is in your Applications folder and MyVolume is the name of the USB flash drive or other volume you're using. If it has a different name, replace MyVolume in these commands with the name of your volume.

Big Sur:*

Catalina:*

Mojave:*

High Sierra:*

El Capitan:

* If your Mac is using macOS Sierra or earlier, include the --applicationpath argument and installer path, similar to the way this is done in the command for El Capitan.

After typing the command:

1. Press Return to enter the command.
2. When prompted, type your administrator password and press Return again. Terminal doesn't show any characters as you type your password.
3. When prompted, type Y to confirm that you want to erase the volume, then press Return. Terminal shows the progress as the volume is erased.
4. After the volume has been erased, you may see an alert stating that Terminal would like to access files on a removable volume. Click OK to allow the copy to proceed.
5. When Terminal says that it's been completed, the volume will have the same name as the installer you downloaded, such as Install macOS Big Sur. You can now quit Terminal and eject the volume.
   

Use the bootable installer

Determine whether you're using a Mac with Apple silicon, then follow the appropriate steps:

How To Download A Disk On A Mac Hard Drive

Apple silicon

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Turn on your Mac and continue to hold the power button until you see the startup options window, which shows your bootable volumes.
3. Select the volume containing the bootable installer, then click Continue.
4. When the macOS installer opens, follow the onscreen instructions.

Intel processor

1. Plug the bootable installer into a Mac that is connected to the internet and compatible with the version of macOS you're installing.
2. Press and hold the Option (Alt) ⌥ key immediately after turning on or restarting your Mac.
3. Release the Option key when you see a dark screen showing your bootable volumes.
4. Select the volume containing the bootable installer. Then click the up arrow or press Return.
   If you can't start up from the bootable installer, make sure the External Boot setting in Startup Security Utility is set to allow booting from external media.
5. Choose your language, if prompted.
6. Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions.

Learn more

How To Download A Disk On A Mac Pro

A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model.

How To Download A Disk On A Mac Keyboard

For information about the createinstallmedia command and the arguments you can use with it, make sure the macOS installer is in your Applications folder, then enter the appropriate path in Terminal: