Is your Mac up to date with the latest version of the Mac operating system (macOS or OS X)? Is it using the version required by some product or feature? Which versions are earlier (older) or later (newer, more recent) than the version currently installed? To find out, learn which version is installed now.

MacOS (originally named 'Mac OS X' until 2012 and then 'OS X' until 2016) is the current Mac operating system that officially succeeded the classic Mac OS in 2001. Although the system was originally marketed as simply 'version 10' of Mac OS, it has a history that is largely independent of the classic Mac OS. It is a Unix-based operating system built on NeXTSTEP and other technology developed. Oct 16, 2019  7 Mac Startup Options Every OS X User Should Know. Jim Tanous Read more October 16, 2019. Apple has a reputation for making products that “just work,” but many Mac users may still need to occasionally troubleshoot their desktop or laptop. Thankfully, there are a number of startup options that are available on recent Macs to aid in both.

If your macOS isn't up to date, you may be able to update to a later version.

Which macOS version is installed?

From the Apple menu  in the corner of your screen, choose About This Mac. You'll see the macOS name, such as macOS Mojave, followed by its version number. If some product or feature requires you to know the build number as well, click the version number to see it.

This example shows macOS Catalina version 10.15 build 19A583.

Which macOS version is the latest?

These are all Mac operating systems, starting with the most recent. When a major new macOS is released, it gets a new name, such as macOS Catalina. And as updates that change the macOS version number become available, this article is updated to show the latest version of that macOS.

If your Mac is using an earlier version of any Mac operating system, you should install the latest Apple software updates, which can include important security updates and updates for the apps installed by macOS, such as Safari, Books, Messages, Mail, Music, Calendar, and Photos.

Learn more

• Always use the macOS that came with your Mac, or a compatible newer version.
• Learn how to reinstall macOS from macOS Recovery.

Windows Migration Assistant transfers your contacts, calendars, email accounts, and more from a PC. It migrates this data to the appropriate places on your Mac. After migrating data to your Mac, authorize your computer for iTunes Store purchases. It’s important to authorize before you sync or play content that you download from the iTunes Store.

If you're migrating from one Mac to another Mac, follow the steps to move your content to a new Mac.

Before you begin

To prepare for a smooth migration:

• Make sure that Windows is up to date. Migration Assistant works with Windows 7 and later.
• Make sure that you know the name and password of an administrator account on your PC.
• Connect your Mac and PC to the same network, such as your home Wi-Fi network. Or connect an Ethernet cable between the ports on your Mac and PC to create a direct network connection. Some Mac models require an Ethernet adapter, such as the Belkin USB-C to Gigabit Ethernet Adapter or Apple Thunderbolt to Gigabit Ethernet Adapter.
• If you're using Microsoft OneDrive on your PC, follow Microsoft's instructions for uninstalling OneDrive before continuing. You can reinstall OneDrive after migration is complete.

Then use the check disk (chkdsk) utility on your PC to make sure that your Windows hard drive doesn’t have any issues:

1. Right-click the Start button, then click Run.
2. Type cmd and press Enter. Command Prompt opens.
3. At the prompt, type chkdsk and press Enter.
4. If the utility reports that it found problems, type the following, where drive is the letter that represents your Windows startup disk, such as D:
   
5. Press Enter.
6. At the prompt, type Y, then restart your PC.
7. Repeat this process until the check disk utility reports no issues. If the utility can't fix every issue that it finds, you might need to have your PC serviced. Then migrate your data to your Mac.

Move your data

This section guides you through migration, post-migration, and what to do if the steps don’t work for you.

How to move your information from a PC to your Mac

1. On your PC, download and install the appropriate Windows Migration Assistant, based on the version of macOS on your Mac:
   • Windows Migration Assistant for macOS Mojave or later
   • Windows Migration Assistant for macOS Sierra and High Sierra
   • Windows Migration Assistant for OS X El Capitan or earlier
2. Quit any open Windows apps.
3. Open Windows Migration Assistant, then click Continue.
   
4. Start up your Mac. Setup Assistant automatically opens the first time you turn on your Mac. If you’ve already set up your Mac, open Migration Assistant, which is in the Utilities folder of your Applications folder.
   
5. On your Mac, follow the onscreen prompts until you get to the migration pane of the assistant. Select the option to transfer your information “From a Windows PC,” then click Continue.
   
6. When prompted, enter an administrator name and password.
7. Click Continue to close any other open apps.
8. In the migration window on your Mac, select your PC from the list of available computers. Then wait for the PC to show the same passcode that your Mac shows.
9. When both computers display the same passcode, click Continue on your PC and Mac.
10. Your Mac scans the drives on your PC to build a list of information to migrate. When the scan completes, select the information that you want to migrate to your Mac and click Continue. Learn about some of the data that you can transfer.
    

You can watch the progress and estimated time remaining on both the PC and your Mac. They tell you when migration is complete.

After you move your data

When migration completes, close Windows Migration Assistant on your PC. Then log in to the new user account on your Mac. The first time you log in to a user account migrated from your PC, you’re asked to set a password. You can use the same password that you used on your PC, or create a new password.

After logging in to the user account that you migrated, your computer for iTunes Store purchases. It’s important to authorize before you sync or play content downloaded from the iTunes Store.

If you have issues moving your data

• Quit all open apps on your PC, then try migrating your content again. For example, you can press Alt-Tab to choose an open application, then press Alt-F4 to quit it.
• If your PC doesn't appear in the Setup Assistant or Migration Assistant window on your Mac, make sure the computers are connected to the same network. You can create an network by connecting a single Ethernet cable between your Mac and PC. If that doesn't help, check for firewall software on your PC and turn it off. Firewall software can block network ports needed during migration. After migration completes, you can turn firewall software on again.
• If Migration Assistant doesn’t open on your PC, turn off any antivirus software on your PC. Then try to open Migration Assistant again. After migration completes. You can turn that software on again.
• If you still can't migrate your information successfully, you can use an external drive or file sharing to manually copy important data to your Mac.

What data can I transfer?

Migration Assistant lets you choose the data to move to your Mac. Here’s what moves over for specific apps and data types:

Mac Migration Assistant Looking For Source

Email, contacts, and calendar information
Email messages, email-account settings, contacts, and appointments move based on which version of Windows you're using and which accounts you have.

Outlook¹
Data from 32-bit versions of Outlook in Windows 7 and later move as follows:

• People move to Contacts²
• Appointments move to the Calendar app
• IMAP and Exchange settings and messages move to the Mail app
• POP settings and messages move to Mail²

Windows Live Mail
Data from Windows Live Mail in Windows 7 and later moves as follows:

• IMAP settings and messages move to Mail
• POP settings and messages move to Mail²

Windows Mail
Data from Windows Mail in Windows 7 and later (excluding Windows 8) move as follows:

• IMAP settings and messages move to Mail
• POP settings and messages move to Mail²
• People move to Contacts

Bookmarks
Bookmarks from Internet Explorer, Safari for Windows, and Firefox move to Safari.

System settings
Language and location settings, and custom desktop pictures move to System Preferences. Your web browser homepage moves to Safari preferences.

Migration Assistant Looking For Source Pc To Mac

Pictures
Photos and other images move to your home folder. You can then add them to Photos, or open Photos and let it search your Mac for photos to import.

Windows Migration Assistant

iTunes content
Migration Assistant transfers your iTunes media as follows: music to the Apple Music app, videos to the Apple TV app, podcasts to the Apple Podcasts app, and audiobooks to the Apple Books app. What happened to iTunes?

Other files
Migration Assistant also moves these files:

• Files from the top-level folder of the currently logged-in user’s home directory
• Non-system files located in the Windows or Program Files folders
• Top-level folders located on the Windows system disk and other attached disks

1. Migration Assistant doesn’t support 64-bit versions of Outlook. You can manually migrate Mail, Contacts, or Calendars from Outlook 2013 or Outlook 2016 by signing in and entering the content on your Mac manually.

Mac Os X Migration Assistant Looking For Other Computers Online

2. Migration Assistant transfers only the Mail or Contacts data that belongs to the logged-in Windows user. To transfer data from another user account, use Migration Assistant again while you’re logged in to another Windows account. Each time you migrate, your Mac creates a new user account.