As a matter of fact, it might take longer to prepare a Time Machine backup incase many files have changed or your previous backup was interrupted.
You can use the Time Machine menu to check the progress of your backup. When Time Machine backs up your data, the ”Backing Up” indicator appears and increments:
If you see an alert message in the Time Machine menu, or you can’t back up at all, see If you can’t back up or restore your Mac using Time Machine.
Keep it in your mind, the first time that you make a backup your Mac with Time Machine, it might take a long time to finish. This is only because Time Machine copies most or all of the data on your Mac to your first backup. You can keep using your Mac while Time Machine works in the background to back up your data.
Then exactly when the first backup is finished, Time Machine works in the background in order to back up only files that have changed since your last backup. It means that your next backup is faster than before.
In case you forced to pause a backup and continue it later, select Skip this Backup from the Time Machine menu. Time Machine automatically tries backing up again later. If you want to start a backup manually, choose Back Up Now from the menu.
Backing up large changes
Some backups might take longer than others when you’ve made to a lot of changes, or changes to large files since the last time you backed up. You might see” Preparing” in the Time Machine menu for a longer period of time when this happens. For instance:
- In case your backup disk isn’t ready (exactly when you’re on travel, or your backup disk is disconnected or powered off) so, Time Machine can’t back up your files. Moreover when you use your Mac for several days without access to your backup drive, it might take longer the next time the drive is available.
- If you’re using virtualization software on your computer, like Parallels or VMWare, that software might create a large disk image or other file to store data related to other operating systems. Time Machine might try to back up the whole disk image, even if you’ve only changed a few files on it. If you want to have the best results, become sure your software is up to date, then check the developer’s support site for information on using Time Machine with these apps. If you want Time Machine to skip these files, you can also tell Time Machine to exclude them from your backup.
- In case you installed recently new software or upgraded macOS, it might take longer to complete the next backup. After Time Machine finishes backing up your new software, backups should be faster.
- When you stopped or interrupted the previous backup suddenly, Time Machine might take longer the next time it backs up your files. This can also happen if you don’t shut down your Mac properly, or if you don’t eject a drive before disconnecting it.
when you’re backing up over a Wi-Fi network, become sure about your Wi-Fi access point or router is nearby. A Wi-Fi network connection can slow down if your Mac is really far away from your router. In this case you can prepare really good idea of how strong your wireless network signal is just by looking at the Wi-Fi menu. In case of more information, check for Wi-Fi issues.
Consider that, when you use antivirus software on your Mac, become sure that software is up to date or not. If it shows to interfere with backing up your computer, you might want to exclude your backup drive from the virus scan. Check the documentation that came with your antivirus utility or contact the maker of the utility for more information.
Check your drives
Your backup might be slower if there’s an issue with one of the drives you’re backing up, or with the drive where your backup is stored.
When you’re using an AirPort Time Capsule, you can make it verify its built-in disk drive:
- Disconnect your AirPort Time Capsule from AC power.
- Wait ten seconds, then reconnect your AirPort Time Capsule to power.
When the built-in drive on your Time Capsule is working, the indicator light on the Time Capsule turns green. If there’s an issue, the light flashes amber. Open AirPort Utility and connect to your Time Capsule to learn more about the issue. If you can’t resolve the issue, you might need to erase the drive using AirPort Utility, after creating an additional backup using Time Machine and another drive. If you can’t erase the drive, your Time Capsule might need service.
For other drives, open Time Machine preferences and turn Time Machine off, then use Disk Utility to verify your startup disk, external backup drives, and any other drives that you’re backing up. You can turn Time Machine back on after your drives are verified or repaired successfully.
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