For most people, Migration Assistant is the fastest and easiest way to set up a new Mac because it moves your user accounts, files, apps, and settings in one process. The trade-off is that it can also bring across old clutter, app leftovers, and software issues from the old setup.
A clean install takes longer, but it gives you more control over what ends up on your new Mac. It can be a better option if your current Mac is sluggish, cluttered, or full of apps and files you no longer use.
Should you use Migration Assistant or start fresh? Use Migration Assistant if your old Mac is working well and you want the easiest move to a new Mac. Choose a clean install if you want a cleaner setup and don’t mind reinstalling apps and moving files manually. Either way, back up your old Mac first and clear out anything you don’t want to carry over.
Migration Assistant is Apple’s built-in macOS tool for moving information from an old Mac, a Time Machine backup, another startup disk, or a Windows PC to a new Mac. It can transfer user accounts, documents, apps, and settings without erasing the original device or backup.
You can use Migration Assistant during new Mac setup or open it later from Applications > Utilities if you’ve already started using your Mac.
Migration Assistant transfers most files, apps, accounts, and settings, but some apps or preferences may need extra setup afterward — especially if your new Mac is running a newer version of macOS.
| Data type | Does Migration Assistant transfer it? | What to know |
| User accounts | Yes | You can choose which specific accounts to move. |
| Documents and folders | Yes | This includes the files kept in your standard folders, like Documents, Desktop, and Downloads. |
| Apps | Usually | Most software moves over, but you may need to reinstall some apps or re-enter a license key. |
| App data and settings | Often | Most of your personal preferences stay the same, though an app might reset if it isn’t fully compatible with the new version of macOS. |
| System and network settings | Yes | Some system preferences transfer as well, including Wi-Fi settings and desktop appearance. |
| Passwords and keychains | Often | Passwords stored in iCloud Keychain may sync after you sign in to iCloud, but some apps and websites may still ask you to sign in again. |
| Photos, music, and media libraries | Yes, if stored locally | Music and photos stored on your hard drive will move. Anything stored in the cloud will usually sync once you sign in. |
| Old clutter | Yes | It can transfer old downloads, unused files, and leftovers from apps you previously removed. |
| macOS itself | No | Migration Assistant doesn’t change the version of macOS installed on your new Mac. |
No, not always. Migration Assistant transfers a lot of data, but some apps or settings may need extra setup once they’re on your new Mac. You might find that an older app does not run properly, or that a program asks you to enter your password or serial number again.
However, things like shared calendars or saved notes may appear automatically once you sign into iCloud since they’re stored online rather than only on your hard drive.
Migration Assistant can also transfer files that you no longer use, like the files apps leave behind after uninstalling. The software is designed to move your data as it is, so it won’t clean up old files or organize your Mac for you.
If you have a lot of files and apps you no longer use, taking time to clean up your old Mac before migrating can help your new Mac feel much lighter and more organized from day one.
For most people, Migration Assistant is the better option if you want to be up and running quickly with most of your files, accounts, apps, and settings already in place. A clean install, while more work, makes it easier to leave behind the clutter that might be slowing your old Mac down.
Here’s a simple breakdown to help you decide:
| Use Migration Assistant if… | Do a clean install if… |
| You want the fastest possible setup. | Your current Mac is cluttered or slower than it used to be. |
| You want your accounts, files, apps, and settings moved together. | You want to reinstall only the apps you actually use. |
| Your old Mac is currently working well. | You think old apps or settings may be slowing your computer down. |
| You’ve recently organized your files and removed what you don’t need. | You’ve gathered years of files and downloads you no longer recognize. |
| You want the migration process to be as simple as possible. | You’re comfortable taking an afternoon to get your new Mac feeling just right. |
In summary, if your old Mac is working well, letting Migration Assistant handle the move is perfectly fine. But if you’re hoping to escape old glitches or a crowded hard drive, starting from scratch can help your new Mac feel cleaner and easier to manage from the start.
Migration Assistant can transfer a lot of data quickly, but it will not organize your files, remove old clutter, or decide what is still useful. Here’s a checklist of things to do before you start:
Moving your files from an old Mac to a new one is straightforward, especially if both Macs are up to date. While you can do this over Wi-Fi, using a cable between the two Macs is often faster, especially if you have a lot of data to move.
Here is the basic process:
When you first turn on your Mac, you’ll get the option to transfer information from another Mac or backup.
If you’ve already started using your Mac, you can still start the transfer at any time. You can find Migration Assistant by opening Finder and going to Applications > Utilities > Migration Assistant.
Or, you can press Command + Space at the same time, then type “Migration Assistant.”
On recent versions of macOS, you can also open Migration Assistant by going to System Settings > General > Transfer or Reset.
Migration Assistant can take anywhere from less than an hour to several hours, depending on how much data you’re transferring. Transfer speed also depends on whether you’re using a cable or Wi-Fi, and whether you’re moving data from another Mac or from a backup drive.
If you’re only moving a few folders and your basic settings, the transfer may finish quite quickly. It’s the heavier items — like decades of family photos, long videos, and a full library of apps — that take longer to transfer.
The process is usually faster if you connect the Macs with a cable. Similarly, if you have a recent backup saved on Time Machine, restoring your data from there is often faster than moving it directly from your old Mac.
Migration Assistant may pause occasionally during large transfers. This is a normal part of the process, and it’s best to give it some time before deciding something is wrong.
Since transfer times can vary, it’s a good idea to start the migration when you have time to let both Macs finish uninterrupted.
No. Migration Assistant doesn’t remove anything from your old Mac — it only copies information to the new Mac. Your original files, apps, accounts, and settings remain on the old Mac unless you manually remove them later.
Once the move is finished, take some time to check that your important files and apps are all on the new Mac. Be sure everything works as expected before erasing, trading, or selling the old Mac.
Migration Assistant is already built into your Mac, so there’s no need to go looking for a download. You’ll find it in your Utilities folder, or by pressing Command + Space and searching for it.
If you’re switching over from a Windows PC, Apple has a separate Windows Migration Assistant tool. It’s best to get it directly from Apple’s site to make sure you’re using the official version.
If Migration Assistant isn’t working, unable to connect, or appears stuck during a transfer, try these common fixes:
A clean install gives you more control over what ends up on the new Mac, but it also means you have to move your files manually.
Some things you may want to move over:
Before you erase your old Mac or trade it in, spend a little time testing your new setup carefully. Open your most important projects, check that your logins work, and make sure you can still access your backups if you need to.
If you can, keep your old Mac or a full backup for a few weeks in case anything was missed during the transfer.
For most people, Migration Assistant is the easiest and fastest way to set up a new Mac. It carries over your accounts, files, and settings all at once, so you don’t have to rebuild your setup from scratch.
Migration Assistant works best if your current Mac is already organized and reliable. If your Mac is cluttered, slow, or filled with old files you no longer need, consider cleaning it up first or going for a clean install instead. This way, your new Mac feels cleaner and easier to manage from the start.
Before you migrate, Intego ONE for Mac can help you scan your old Mac for malware. You can also use SmartClean to find files, duplicates, and app leftovers you may not want to carry over to your new Mac.
Migration Assistant is Apple’s built-in tool for moving data from an old Mac, a backup drive, startup disk, or Windows PC to a new Mac. It can transfer user accounts, files, apps, and many system settings without erasing the original Mac or backup.
No, not always. Migration Assistant transfers most files, apps, and settings, but some apps may need to be updated or reinstalled, and certain licenses, logins, or system settings may not carry over perfectly.
Migration Assistant can take anywhere from less than an hour to several hours. The total time depends on how much data you’re transferring, the connection type (Wi-Fi or cable), and whether you’re transferring from another Mac or a backup.
No, Migration Assistant only copies data to the new Mac — it doesn’t erase the old one. It’s best to keep your old Mac or its backup until you’re sure everything has transferred correctly.
Migration Assistant is already built into your Mac. You can find it in Applications > Utilities. You can also open it with Spotlight by pressing Command + Space and typing “Migration Assistant.”
Yes. You can use Migration Assistant after setting up your new Mac. Keep in mind that transferred user accounts may remain separate from the account you already created on the new Mac.
Use Migration Assistant if you want the fastest and easiest setup and your old Mac is in good condition. Start fresh if your old Mac is cluttered, slow, or filled with apps and files you no longer need.
Migration Assistant can appear stuck during large transfers. Wait a while before interrupting it. If it still seems stuck, try restarting both Macs, checking the connection, using a cable if possible, or transferring from a backup instead.
No, not on Mac. Migration Assistant is built into macOS. You only need to download Windows Migration Assistant from Apple if you’re transferring data from a Windows PC to a Mac.
