From July 1, 2019, the Back to My Mac service will no longer be available in any version of macOS. You can use these options for file access, screen sharing, and remote desktop access.
• Access files across your devices with iCloud Drive: When you turn on iCloud Drive, your files automatically load to iCloud, where they are securely stored and available on all your devices. Turn on your desktop and document folders in iCloud Drive to save them in iCloud as well. Now you have access to all your files, on any device, at any time.
Learn how to configure iCloud Drive and add desktop files, or get more help with iCloud Drive.
You start with 5 GB of free iCloud storage and can upgrade any time from any device. iCloud Drive has an individual file size limit of 50 GB.
• Access your other Mac with screen sharing: If you have more than one Mac, screen sharing can share you with a Mac to see and control your other Mac remotely. This means you can open, move, and close files and windows, and use applications – even if you're in another location – so you can always get what you need. Learn how to configure and use screen sharing.
• Manage your Mac remotely with Apple Remote Desktop: If you have more than one Mac, Apple Remote Desktop also lets you run apps and work on files that are on your other Mac, even if you are in another place. So if you want to use an app that's just on your other Mac, you can. Learn how to use Apple Remote Desktop.
Source: Apple Inc.
MacDailyNews Note: Apple Remote Desktop (US $ 79.99) offers more remote control features than screen sharing, including installation and configuring apps, helping remote users and creating detailed reports .
Screen sharing and screen sharing by Apple Remote Desktop is compatible with Virtual Network Computing (VNC).