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Sector - HFS Disk Image Creator & Editor for modern macOS

Posted by: davecom on 2026-02-19 21:09:54

Hi All,
I released a new little Mac app called Sector for creating and editing HFS disk images on modern macOS (11.5+). This is to make it easier to work with disk images on your modern Mac for emulators like mini vMac and Basilisk II, or virtual disk devices like Blue SCSI, Zulu SCSI, and Floppy Emu.

You can learn more about it here:

Sector

Sector is a raw HFS disk image editor and creator for virtual disk devices like Blue SCSI, Zulu SCSI, and Floppy Emu and emulators like Mini vMac, Basilisk II, and SheepShaver. You can use it to create and edit HFS disk images including transferring files in and out of the disk image.

oaksnow.com

And here are five promo codes for a free copy on the Mac App Store for this great community:

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Please make sure to backup any disk images with valuable data before editing them with Sector. Sector comes with no guarantee that a bug won't hurt your data! Any edits you make to disk image with Sector are irreversible.

Posted by: eharmon on 2026-02-19 21:57:00

Neat! A GUI for hfsutils is quite handy and HFVExplorer only works on Windows. Does this support both unpartitioned (emulator) and partitioned disks?

Building in pdisk as well to allow for advanced partitioning would really be a killer app for a drag-and-drop tool for ease of use.

It's great this is open source, might I suggest a repo link on the website? Sometimes you've got to make a buck and I think source-without-binaries is a reasonable line, but it might encourage more contributions if it's less buried 🙂.

Posted by: davecom on 2026-02-19 22:10:02

Neat! A GUI for hfsutils is quite handy and HFVExplorer only works on Windows. Does this support both unpartitioned (emulator) and partitioned disks?

Building in pdisk as well to allow for advanced partitioning would really be a killer app for a drag-and-drop tool for ease of use.

It's great this is open source, might I suggest a repo link on the website? Sometimes you've got to make a buck and I think source-without-binaries is a reasonable line, but it might encourage more contributions if it's less buried 🙂.

Thanks for the feedback.

It will detect if a disk image has more than one HFS partition and let you select between them. If a disk image has multiple partitions but only one is HFS it will automatically just open the HFS partition.

Note that it is not compatible/safe to use with disks that have HFS+ partitions.

Posted by: Juror22 on 2026-02-19 22:13:03

Looking forward to trying this out and finding out more about it!
Thank you so much for making this available, and also for the additional HFS+ warning.

Posted by: Scorpio_ny on 2026-02-19 22:50:06

Thank you very much for this utility! Going to try it out some of my BlueSCSI images.