How to set up a new Mac: transfer everything or start fresh?
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Kamso Oguejiofor-Abugu
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.
What is Migration Assistant on Mac?
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.
What does Migration Assistant transfer?
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. |
Does Migration Assistant transfer everything?
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.
Migration Assistant vs clean install: decision checklist
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.
What to do before using Migration Assistant
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:
- Back up your Mac: Before migrating, get a full copy of your Mac’s data. Using Apple’s built-in backup software, Time Machine, or another backup method helps keep your files safe, no matter how the transfer goes.
- Update macOS and apps: Take a moment to install any available app and macOS updates on your old Mac. This can help the two computers communicate better during the transfer, especially if the new Mac is running a newer macOS version.
- Remove apps you no longer use: Old apps can take up storage and add unnecessary clutter. If there are apps you no longer need, removing them can help reduce slowdowns on the new Mac.
- Empty the Trash: Many Macs have large files sitting in the Trash. Emptying it before you start means you aren’t moving files you’ve already decided to throw away.
- Check your available storage: Make sure your new Mac has enough storage space. If your old Mac is almost full, you might want to select only the most important things to transfer.
- Keep passwords and license keys nearby: While Migration Assistant moves most of your data automatically, some apps will still ask you to sign back in. Having your login details and any license keys ready can save time later.
- Confirm cloud syncing is finished: If you keep files in iCloud, Google Drive, or similar services, check that they’re fully synced so your latest files are ready on your new Mac.
- Run a malware scan: Since you’ll likely transfer everything on your old computer, it’s a good idea to run a malware scan on it. It’s much easier to catch a problem before it moves to your new Mac.
- Clean up leftovers and duplicates: Over time, Macs collect old installers, duplicate files, screenshots, and files from apps you deleted long ago. Cleaning your old Mac before migrating helps keep your new Mac from feeling cluttered on day one.
How to use Migration Assistant from Mac to Mac
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:
- Back up your old Mac: Always make sure you have a current backup before you begin. Using Time Machine is a reliable way to do this.
- Update your software: If you can, take a moment to update the macOS and apps on both computers first.
- Keep both Macs nearby and connected to Wi-Fi and power: Keep both Macs near each other, and make sure they’re both plugged into a power source and connected to the same Wi-Fi network.
- Use a wired connection: While Wi-Fi works, using a physical cable (like Thunderbolt or Ethernet) can make the transfer faster and less likely to be interrupted.
- Open Migration Assistant on the new Mac: You can start the transfer during the initial setup of your new Mac or find Migration Assistant in the Utilities folder inside Applications.
- Select the source: Choose the option to move information from another Mac, a Time Machine backup, or a startup disk.
- Open Migration Assistant on the old Mac: On your old Mac, open the same app and select the option to send your data to another Mac.
- Confirm the security code: A code will appear on both screens; check to make sure they match.
- Select what to transfer: Choose which user accounts, apps, and folders you want to move to the new Mac.
- Give the computers time to finish: Leave both Macs alone until the transfer is finished and the system tells you it’s ready.
How to open Migration Assistant on Mac
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.
How long does Migration Assistant take?
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.
Will Migration Assistant wipe your old Mac?
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.
Can you download Migration Assistant?
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.
Migration Assistant not working: common fixes
If Migration Assistant isn’t working, unable to connect, or appears stuck during a transfer, try these common fixes:
- Restart both Macs and try again.
- Plug both computers into a power outlet. These transfers can take a long time, and you don’t want the system to shut down mid-transfer.
- Make sure both Macs are on the same Wi-Fi network, and keep them in the same room, so they have a clear, strong signal between them.
- Connect the two Macs with a Thunderbolt or Ethernet cable if possible — it’s often more stable and much faster than using Wi-Fi.
- Check that both Macs are running the latest version of macOS available to each Mac before you start.
- Check your old Mac’s settings to ensure it isn’t set to sleep or turn off its display during the transfer.
- If a direct transfer doesn’t work, try transferring from a backup drive like Time Machine instead.
- Disconnect any external drives or accessories that aren’t needed.
- If the Macs still can’t find each other, check whether a VPN or firewall setting is blocking the connection. Pause the VPN or allow the Migration Assistant connection through the firewall if needed, then return your settings to normal once the transfer is complete.
- If the progress bar appears stuck, try waiting a bit before restarting the process.
Clean install checklist: what to copy manually
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:
- Your main files: This includes everything on your desktop, in your Documents folder, and any specific projects you’re currently working on.
- Media: Your photo library, music, and any videos you have saved locally.
- Downloads: Look through your downloads folder and keep only the specific files you know you’ll need again.
- Web browsing: Any bookmarks you’ve saved and your stored passwords.
- Apps and licenses: A list of the apps you use, their license keys, and any custom fonts you’ve added.
- Email and message archives: Any old email archives that aren’t already stored in services like Gmail or iCloud.
- Hidden items: Any files stored outside your usual folders.
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.
Final recommendation: the best way to set up your new Mac
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.
Frequently asked questions
What is Migration Assistant on 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.
Does Migration Assistant transfer everything?
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.
How long does Migration Assistant take?
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.
Does Migration Assistant wipe the old Mac?
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.
Where is Migration Assistant on Mac?
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.”
Can I use Migration Assistant after setting up my new Mac?
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.
Should I use Migration Assistant or start fresh?
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.
Why is Migration Assistant stuck?
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.
Do I need to download Migration Assistant?
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.
