Sector
Edit HFS Disk Images

For your emulator or virtual disk device.

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Edit HFS Disk Images

Sector can open and change the file structure of any raw HFS disk image (typically .img or .hda). Transferring files to and from the Finder is as easy as drag and drop. The interface makes it easy to move files around, delete files, or change file attributes like name, type, and creator codes.

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Create HFS Disk Images

Choose your size and your volume name. Then you’re just dragging and dropping what you want on your disk. While Sector cannot create bootable disk images 

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Edit HFS Disk Images

Use an easy drag-and-drop interface to modify HFS disk images (typically .img or .hda files). Transfer files in-and-out, move, rename, and delete files.

Create HFS Disk Images

Create disk images for your favorite emulator or virtual disk device on a real classic Mac.

Change Type/Creator Codes

Modify type and creator codes so your files open in appropriate applications on the classic Mac OS.

Preserve Resource Forks

Sector can automatically export files containing resource forks as MacBinary or Binhex when transferred to your modern Mac from a disk image.

Repair HFS Disk Images

Sector can attempt to repair disk images that have become corrupted. (But its success is not guaranteed and this feature may result in data loss. Always backup your disk image first.)

Set Blessed Folder

More than one System Folder on your bootable disk image? Sector can change which one is “blessed” or the one to boot of of. Note that Sector cannot create bootable disk images, only edit them.

Questions

If you have any other questions you want to ask, please get in touch.

What disk image types are supported?

Sector can edit and create raw HFS disk images. These typically have the extension .img or .hda, sometimes .disk. Sector cannot modify disk images that are in compressed or encrypted formats like .dmg or NDIF (Disk Copy).

Can it edit HFS+, MFS, or APFS disk images?

No, Sector can only edit HFS disk images. It is not compatible with HFS+ (a newer file system) or MFS (the file system used briefly on the Macintosh 128K for 400K disks) .

Is it compatible with Blue SCSI, Zulu SCSI, and Floppy Emu?

Yes, Sector is perfect for editing the kind of raw HFS images that all three of these devices expect.

Does it work with Mini vMac, Basilisk II, and SheepShaver?

Yes, raw HFS disk images are also the standard format for all of these popular Classic Mac emulators.

Will my data be safe?

Not necessarily. Sector’s changes to a disk image are irreversible and Sector may have bugs. It comes with no guarantee or warranty for any particular purpose and use of Sector may result in data loss. You should backup any images with valuable data before editing them with Sector.

How does Sector handle resource forks?

Sector has built-in support for MacBinary and Binhex. In Auto, MacBinary, and Binhex transfer modes, Sector will automatically wrap files containing resource forks before transferring them to your modern Mac’s file system. It will also automatically convert MacBinary and Binhex files back to resource fork containing files on your disk image when you transfer such files to it. To turn this off, select the Raw transfer mode.

Get Sector Now

Sector can be easily obtained on the Mac App Store.

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