You might also want to try "Super Duper" which allows you to clone an entire Mac disk very easily. You can then test the backup by booting from the disk. It's also helpful when installing a new OS. Clone your existing disk, install the new OS on the clone (or on the original knowing you have an exact clone if anything goes wrong).
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You might also want to try "Super Duper" which allows you to clone an entire Mac disk very easily. You can then test the backup by booting from the disk. It's also helpful when installing a new OS. Clone your existing disk, install the new OS on the clone (or on the original knowing you have an exact clone if anything goes wrong).