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Migration Assistant copies all of your files to your new Mac so that you don't have to copy your files manually.

• If your files are currently on a Windows PC, follow the PC migration steps instead.
• If your new Mac is using OS X Mountain Lion v10.8 or earlier, follow the Mountain Lion migration steps instead.

Check software, settings, and power

• Install all available Apple software updates on both Mac computers. Install any updates for your third-party apps as well.
• Make sure that your old Mac is using OS X Lion or later.
• Make sure that your old Mac has a computer name: Choose Apple menu  > System Preferences, then click Sharing and check the Computer Name field.
• Connect both computers to AC power.

Connect the computers to each other

• If both computers are using macOS Sierra or later, just make sure that they're near each other and have Wi-Fi turned on. If either is using OS X El Capitan or earlier, connect them to the same network using Wi-Fi or Ethernet.
• Or connect them using target disk mode and the appropriate cable or adapter. Then start up your old computer in target disk mode.
• Or connect your new Mac to a Time Machine backup of your old Mac.

Use Migration Assistant

On your new Mac:

1. Open Migration Assistant, which is in the Utilities folder of your Applications folder.
   
2. Click Continue.
3. When asked how you want to transfer your information, select the option to transfer from a Mac, Time Machine backup, or startup disk.
4. Click Continue.

On your old Mac:
If you started your old Mac in target disk mode or are migrating from a Time Machine backup, skip these four steps.

1. Open Migration Assistant.
2. Click Continue.
3. When asked how you want to transfer your information, select the option to transfer to another Mac.
4. Click Continue.

On your new Mac:

1. When asked to select a Mac, Time Machine backup, or other startup disk, click the appropriate icon.
2. Click Continue. You might see a security code.

On your old Mac:
If you started your old Mac in target disk mode or are migrating from a Time Machine backup, skip these two steps.

1. If you see a security code, make sure that it's the same code as on your new Mac.
2. Click Continue.

On your new Mac:

1. Choose the backup to transfer information from.
2. Click Continue.

Continuing on your new Mac:

1. Select the information to transfer from the backup.
2. Click Continue to start the transfer. If you have a lot of content, the transfer might take several hours to finish.

In the example above, John Appleseed is a macOS user account. If you transfer an account that has the same name as an account on your new Mac, you're asked to rename the old account or replace the one on your new Mac. If you rename, the old account appears as a separate user on your new Mac, with a separate home folder and login. If you replace, the old account overwrites the account on your new Mac, including everything in its home folder.

After Migration Assistant is done, log in to the migrated account on your new Mac to see its files. If you're not keeping your old Mac, learn what to do before you sell, give away, or trade in your old Mac.

Buying a new Mac is hugely exciting. But if there’s one thing that takes the edge off the thrill, it’s the prospect of transferring files from your old Mac to the new one. It’s not just documents, of course, it’s applications, settings files, caches and everything else that’s involved in setting up your Mac just the way you want it.

Some people, of course, like starting from scratch on a brand new machine. For the rest of us, who just want to get up and running as quickly as possible, there’s Apple’s Migration Assistant.

The Mac Migration Assistant makes it easy to transfer all your files from one Mac to another. It can also transfer files from a Time Machine backup or an external clone drive. And, if you’ve just come over from the dark side, it will even transfer files from a Windows PC!

Preparation for Migration Assistant

Before you do anything else, it’s a good idea to backup your old Mac using Apple’s Time Machine or another backup application. Better still, make a bootable clone of the startup disk. If something goes wrong with your old Mac’s disk during the migration process, you can still migrate from either the Time Machine backup or the clone.

Using Migration Assistant is very easy, but there are a few things to check and prepare before you get started.

Apple Pc Migration Assistant

• Check that both Macs are running the most up-to-date versions of their operating systems. If not, update them.
• Make sure all the applications on your old Mac are up-to-date.
• Make sure your old Mac is running OS X Snow Leopard 10.6.8 or later.
• Check that your old Mac has a computer name by going to the menu and selecting System Preferences, then the Sharing pane. Check there’s a name in the Computer Name box. If not, add one.
• Connect both Macs to an AC power outlet.

With that all done, you’re ready to start! The next step is to connect the Macs to each other. There are number of options for this. If both Macs are running macOS Sierra or later, you can just place them next to each other and make sure WiFi is switched on both machines. Clever, huh?

If one or both are running macOS El Capitan or earlier, make sure they are both connected to the same WiFi or Ethernet network.

Target Disk Mode

If, for some reason, you can’t connect them wirelessly, you can connect them using a cable and use Target Disk mode. Target Disk mode can be used with Thunderbolt 3 (USB-C), Thunderbolt 2, or FireWire cables.

You can connect USB-C to USBC (or Thunderbolt 3) using a Thunderbolt 3 or USB-C cable, though not the USB-C charging cable that comes with the MacBook Pro. To connect USB-C to USB-A, you’ll need a USB-C to USB-A cable that supports USB 3.0. You can also use Apple’s Thunderbolt 3 (USB-C) to Thunderbolt 2 adapter combined with a Thunderbolt 2 cable to connect Thunderbolt 3 to Thunderbolt 2. And any Firewire cable can be used to connect Firewire-to-Firewire.

Once you’ve connected the two Macs, go to System Preferences on the old Mac, click Startup Disk and press Target Disk mode then click Restart. Or, if the old Mac is powered off, boot it while holding the “T” key. The old Mac will now mount as a disk volume on the new Mac.

Using Migration Assistant to transfer files from one Mac to another

Now you’ve connected the two Macs together, or used Target Disk mode, you’re ready to use Migration Assistant.

On the new Mac

1. Go to the Utilities > Applications. Double-click Migration Assistant to launch it.
2. Click Continue.
3. Choose the first of the three options on the next screen: “From a Mac, Time Machine backup, or startup disk.”
4. Click Continue.

The next four steps only apply if you didn’t use Target Disk mode to connect the two Macs. If you did, you can skip them. Likewise, if you wanted to migrate from a Time Machine Backup or cloned drive, you would give these four steps a miss.

On the old Mac

1. Open Migration Assistant from the Utilities folder.
2. Click Continue.
3. This time, when you see the options for how you want to transfer data, choose: “To another Mac”
4. Click Continue.

Migration Assistant Mac

Back to the new Mac…

1. You’ll be asked whether you want to migrate from a Mac, Time Machine backup, or startup disk, choose from a Mac.
2. Click Continue.
3. If you see a security code after you click Continue, check your old Mac and make sure it is displaying the same security code.
4. Click Continue on the old Mac.
5. You should see the name of your old Mac appear in the Migration Assistant window on your old Mac. Click it.
6. Click Continue.
7. You’ll now see a list of the data on your old Mac. If you want to transfer everything, check all of the boxes. If not, check only the boxes that describe the data you want to transfer.
8. Click Continue.

At least one of the options you’ll see on-screen in Step 7 will be a user account. If you have more than one user account on the old Mac, you’ll see them all listed. If you choose to transfer them, the whole account will be transferred and a new account created with the same name. If you already have an account on the new Mac with the same name as one of the accounts you’re transferring, you’ll be asked whether you want to rename the account on the old Mac. If you do, a new account will be created on the new Mac with the new name you provide. If you don’t rename the account, it will overwrite the account with the same name on the new Mac.

The transfer could take several hours, depending on how much data there is to copy, so go and make a coffee!

Transfer files from a Time Machine backup with Migration Assistant

The process of transferring files from a Time Machine backup is the same as described above, except that you can ignore all the steps that involve the old Mac. And, when you’re asked whether you want to migrate from a Mac, Time Machine backup, or startup disk, choose Time Machine backup. On the next screen, choose the backup you want to migrate.

Tip: There is a way to reduce the time it takes to transfer all files from one Mac to another — get rid of data you don’t need before you start. The fewer files Migration Assistant has to transfer, the quicker it will be.

The best way to get rid of files cluttering up your Mac is to use CleanMyMac X. It identifies files you can safely remove from your Mac, including system junk, unnecessary Photos files, and large and old files. It can also safely uninstall applications you no longer need. Give it a try and you’ll find you can reduce the amount of data you need to transfer by several gigabytes.

Transferring files from one Mac to another using Apple Migration Assistant is very easy. It can take some time to complete, but you can reduce that time by getting rid of unwanted files using CleanMyMac X.

Mac Migration Assistant Download

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