SuperDuper! on your Mac — 4.0.7

SuperDuper! runs on any Mac with macOS 10.13 or later, including both Intel and Apple Silicon machines. It is a disk-cloning and backup utility that creates bootable copies of your Mac's hard drive.

What SuperDuper! does

Bootable backup — A copy of your startup drive that can boot your Mac if the original fails.

Disk cloning — An exact duplicate of one drive onto another, including system files and apps.

Scheduled backups — Automatic copying at set times, without you remembering to run it.

Manual folder copying — Copy selected files or folders from a source to external media when you choose.

System checkpoints — Create restore points so you can return to an earlier system state after an update or problem.

Version 4.0.7 introduces a specific fix for users running macOS 27 Golden Gate. The workaround addresses a problem where the startup drive might not appear correctly in the backup destination list. If you have updated to that version, SuperDuper! now handles the boot registration process differently so the drive is visible and selectable. For everyone else on older macOS releases, the behavior remains unchanged — the update simply adds compatibility without altering the core workflow.

Cloning for IT staff who migrate multiple Macs

System administrators and IT staff get the most out of cloning because they often migrate multiple Macs to identical setups. An exact disk copy means every preference, login item and permission transfers exactly — no manual reconfiguration after deployment.

Users upgrading to a new Mac appreciate the bootable clone approach. Instead of relying on Migration Assistant over a network, you connect the old drive via an external enclosure, clone it to the new machine, and boot directly from the clone. All data and settings arrive in one pass.

Anyone running beta software or major OS updates benefits from checkpoints. Before installing a developer preview or a macOS point release, create a checkpoint. If the update causes instability, you restore the earlier system copy and continue working within minutes.

Home users with a single Mac find scheduled backups useful for peace of mind. Set a weekly clone to an external drive and forget about it. If the internal drive fails, you boot from the external and carry on with minimal downtime.

Destination drive missing from SuperDuper!'s list

Destination drive not appearing in the list — The most frequent issue. Make sure the external drive is formatted as Mac OS Extended (Journaled) or APFS. SuperDuper! cannot clone to drives formatted as NTFS or exFAT. If the drive still does not show, open Disk Utility, select the drive, and choose Erase with the correct format. Also confirm the drive is mounted on the desktop.

Backup fails partway through — Usually a permissions or connection problem. Unplug the external drive, restart the Mac, reconnect the drive, and try again. If the error mentions a specific file, that file might be locked or in use. Close all open applications before starting the clone.

Bootable clone does not boot — Restart the Mac while holding the Option (Alt) key. You should see the clone as a startup volume. If it is missing, the clone was not created as bootable. Check that you selected the correct source (your internal startup disk) and that the destination drive is formatted for Mac. Some external enclosures do not support booting; try a different enclosure or cable.

Scheduled backups do not run — Open SuperDuper! and verify the schedule is enabled. The Mac must be awake or set to wake for scheduled events in Energy Saver settings. If the external drive disconnects when the Mac sleeps, schedule the backup for a time when you are actively using the machine.

Selecting a data volume instead of the startup disk

Choosing the wrong source — Beginners sometimes select a volume that contains only data, not the full system. Always select the startup disk (usually named Macintosh HD) as the source if you want a bootable backup.

Not verifying the destination format — Running the clone on a drive with insufficient space or the wrong file system leads to immediate failure. Check the destination drive has at least as much free space as the source, and format it as Mac OS Extended or APFS before starting.

Assuming a clone replaces Time Machine — A clone is a snapshot of your system at one moment. It does not keep multiple versions of changed files. Use SuperDuper! alongside Time Machine — the clone for disaster recovery, Time Machine for file version history.

Forgetting to test the clone — The only way to know a clone works is to boot from it. Beginners create the backup, store the drive, and discover it fails only when they need it. Once the clone finishes, restart your Mac while holding Option and select the external drive. If the Mac boots normally, the clone is good. Shut down and restart from your internal drive again.

Ignoring the scheduler setup — Manual backups are fine for one-time use, but beginners often schedule a clone and never check whether the external drive is connected at the scheduled time. Make it a habit to keep the external drive plugged in and powered on during backup windows.

• macOS 10.13 or later
• Intel or Apple Silicon