If you want to
upgrade your Mac OS X that you use now to the
new OS X Lion, then one of the important things you should do is to back up your files. This is to anticipate if one day the files are corrupted or missing, then you will be able to use the backup file you have created.
“You should perform regular backups of your system and keep multiple backups of important, irreplaceable files. Without multiple backup copies of your files, your files do not exist anywhere except on your Mac.” As written in the official website of Apple.
There are a few ways that you can take to back up your files. The following is a glimpse about
how to backup files on Mac OS X:
Manually backing up files
You can create a burn folder to collect files you want to burn onto a CD or DVD. Burn folders are especially handy for burning several copies of a folder, or for regularly backing up a set of files by burning them to discs.
Here are the steps to create and use a burn folder:
- Click the desktop (the background area of your screen) if you want to keep the burn folder on the desktop; otherwise, open the window where you want to keep the burn folder.
- Choose File > New Burn Folder, and type a name for the folder.
- Drag to the burn folder the items you want to burn to a disc.
- The Finder places aliases to the items in the burn folder; the originals are not moved.
- When you’re ready to burn the folder’s contents to a disc, double-click the burn folder and click Burn.
- Insert a disc and follow the instructions.
The original files that the aliases point to are burned to the disc. In addition, if any folder in the burn folder contains aliases, the original files for those aliases are burned to the disc as well.
If the Finder cannot find the original file for an alias, it asks whether to cancel burning or to continue without that item. If you cancel, the disc remains empty.
If a burn folder is in the sidebar of a Finder window, you can quickly burn its contents to a disc by clicking the burn icon beside it.
Using Disk Utility
This alternative backup process will produce a disk image of your entire Mac OS X disk's contents. This process preserves the unique attributes of your files, such as permissions, ACLs and UUIDs. A disk image backup is good for an archive-type backup for offsite storage.
You may wish to store the external disk in a different location (an offsite backup). If your external disk does not have enough free space to hold future backups, consider using a different disk or deleting prior backups to free up space on the external disk.
Here are the Instructions for backing up to an external hard disk via Disk Utility:
- Connect an external hard drive (FireWire or USB) that has sufficient free space to hold at least one copy of the contents of your Macintosh HD.
- Start from your Mac OS X 10.5 or 10.6 Install DVD. (Insert the disc, then restart and hold the C key.)
- Select your language. Do not start an installation.
- Choose Disk Utility from the Utilities menu.
- Select the disk you wish to back up (your source disk, such as Macintosh HD) in the source pane on the left.
- Click "Verify Disk" to check the hard disk for issues. If an issue is found, click "Repair Disk" to repair.
- Click the "New Image" button in the toolbar.
- Give your image a useful name such as "04-15-2009 Macintosh HD backup". A date in the name makes it easy to tell when the backup was made.
Note: For additional security, you can encrypt the backup disk image. From the "Encryption:" pop-up menu, select either 128-bit or 256-bit AES encryption. When prompted enter a password for the encryption: Use the password assistant to help you make a good password, or see this link for information about how to choose a good password.
- Be sure the Save destination is a location on your external hard disk, then click "Save" to continue.
- Enter your admin name and password if prompted. The imaging process will begin. The time it takes to complete the imaging process depends on factors such as the amount of data on your Macintosh HD. Approximately 1 GB per minute will be imaged, depending on various factors.
- When the imaging process is complete, select the newly created disk image in the device pane. Then, choose Images > Scan Image for Restore... from the menu bar, and let the scan complete.
- Quit Disk Utility (press Command-Q). Then press Command-Q to quit the Mac OS X installer; you will be prompted to restart.
Here are the Instructions for Restoring the backup disk image's contents to your internal Mac OS X disk:
Note: If the Mac you are restoring to is not the same Mac you used to make the backup disk image, use Migration Assistant instead of Disk Utility to properly transfer the data back to your Mac.
Important: These steps will overwrite data with the same name in the same location, such as files on your desktop and in your Home folder.
- Connect the external disk you've backed up to.
- Start from your Mac OS X 10.5 or 10.6 Install DVD. (Insert the disc, then restart and hold the C key.)
- Select your language. Do not start an installation.
- Choose Disk Utility from the Utilities menu.
- Select your internal Mac OS X disk that you want to restore to.
- Click the Restore tab.
- Drag your internal disk to the "Destination:" field.
- Click the "Image..." button next to the "Source:" field.
- Navigate to the location of the backup image you want to restore (located on your external disk).
- Click "Open" to continue.
- Click the "Restore" button. Confirm you want to "Restore to Disk" by clicking "Restore" again. This will replace data on your Mac OS X volume with data from your backup that has the same name and is in the same location.
- Enter your admin name and password when prompted. If the backup disk image is encrypted, enter the disk image password if necessary. The time it takes to restore from the image depends on factors such as the amount of data on your backup disk image.
Using Time Machine
Mac OS X v10.5 and later include Time Machine so you can automatically back up your system and your important, irreplaceable files to a different hard disk or network volume. Time Machine also has an intuitive interface for restoring your files or your entire system.
See this
article for more information about Time Machine.
If you need more information about
how to backup and restore files on Mac OS X, please
visit Apple Support.