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Your rating: None Average: 5 (8 votes)
Year released:
[www].se [ftp].se [mirror].us [mirror].de
disdup154.sit (14.25 KB)
MD5: 77024718438a31492408a377c186acb0
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDupPlus1.6.sit (16.04 KB)
MD5: 7dd6cc05910ae3f84223b74450f0c1bf
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDupPlus2.1.sit (21.59 KB)
MD5: a161997c3518953acfdc20b6ba34bbd0
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDupPlus251.sit (38.98 KB)
MD5: 91325863706533d8895abaeb339c5f14
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup26a.sit (42.79 KB)
MD5: 8b145b90822769d864a332957b5b9c56
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
diskdupplus-27.sit (50.17 KB)
MD5: e6fa540cf43803e294cba6989c5faf94
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup271.sit (50.74 KB)
MD5: cb0e1ce17a1c6f7da0843bfbb39be833
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDupPro103.hqx (105.09 KB)
MD5: db511a0e445fc600f31a5acb42aee98e
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup282.sit (52.16 KB)
MD5: b6ba1dffd45ed3884f7985b62469da1c
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup_Pro1.2.hqx (121.73 KB)
MD5: bf87bd3e1110e3e7955f102f3d2f65b8
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup2.9.1.sit (53.92 KB)
MD5: 6ea3a3bdf28cdbdd9d51daa5f5f046fb
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup2.9.2.sit_.bin (60.63 KB)
MD5: 355566f782c61f56829cc608fa6451ec
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
DiskDup292a.hqx (74.40 KB)
MD5: 7cdf08a712b31e6a2a111903f7070a93
For System 6.x - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
diskdup_pro_1.3.2a.sit (60.03 KB)
MD5: ea4918e688b5ffc00e4953b21549854f
For System 6.x - Mac OS 9

DiskDup is a shareware utility that creates, mounts, and writes disks and disk images of floppy disks and other media. Unlike ShrinkWrap, DiskDup can create images of 400K MFS disks. It can overcome mild forms of copy protection, and can also be set to tolerate bad sectors in the case of damaged media.

DiskDup is available as either the shareware Plus ("+") release, or its commercial Pro variant, though confusingly, the version numbers of each do not correspond with one another. For clarity's sake, the downloads here are listed in their approximate release order, with the Pro version listed following it's corresponding Plus release, when available.

The principle distinction between the Plus and the Pro versions is the added ability in Pro to duplicate any size removable cartridge (Zip, Syquest, Bernoulli, etc.), in addition to floppy disks. The last available releases of DiskDup are DiskDup+ 2.9.2a and DiskDup Pro 1.3.2a. If in doubt, use one of these.

List of available versions:

  1. DiskDup+ 1.5.4, as found at
  2. DiskDup+ 1.6, as found on MacRepo (originally bundled with La Cie's Silverlining)
  3. DiskDup+ 2.1, as found on MacGUI
  4. DiskDup+ 2.5.1, as found on MacRepo
  5. DiskDup+ 2.6a, as found on VintageAppleMac.
  6. DiskDup+ 2.7 (compressed using StuffIt 3.6)
  7. DiskDup+ 2.7.1, as found on MacGUI
  8. DiskDup Pro 1.0.3, as found on Grenier du Mac (repackaged as a binhexed StuffIt file)
  9. DiskDup+ 2.8.2, as found on VintageAppleMac.
  10. DiskDup Pro 1.2 (pre-registered)
  11. DiskDup+ 2.9.1, as found on VintageAppleMac. (2.9.0 was the first version with HFS+ compatibility.)
  12. DiskDup+ 2.9.2 (April 1999) - Provided as an emulator-ready disk image
  13. DiskDup+ 2.9.2a (September 1999 - as found on Roger Bates' website, via Internet Archive)
  14. DiskDup Pro 1.3.2a (pre-registered)

See also
DiskCopy 4.2
DiskCopy 6
ShrinkWrap 2.1 & 3.5.1
Copy II Mac

Architecture: 68k

To "register" a copy of DiskDup+, enter three (3) consecutive spaces with the spacebar into the "Copies" field.


MikeTomTom's picture
by MikeTomTom - 2020, October 29 - 9:37pm

DD Pro 1.3.2a needs more than 4 MB of memory, as i just found out on my SE/FDHD.

Hi zoinknoise. I'm not sure why that could be happening for you as it loads in as little as 600k for me, which is what it is set to, after extracting it from the .sit archive.

zoinknoise's picture
by zoinknoise - 2020, October 29 - 8:41pm

heads up: DD Pro 1.3.2a needs more than 4 MB of memory, as i just found out on my SE/FDHD.

lilliputian's picture
by lilliputian - 2020, September 11 - 3:42am

I had found several, and so just was trying to get as many up as I could find or knew about.

mrdav's picture
by mrdav - 2020, September 11 - 12:00am

DiskDup v. 2.2.1 is on World of Mac and The Ultimate Macintosh Collection in Utilities. I have not looked at them to check that they are what you want (There is no + in the folder names).

Also I can point you at other old versions if you are trying to get them all.

lilliputian's picture
by lilliputian - 2020, September 10 - 10:50pm

Nice! Thank you!

Franky233's picture
by Franky233 - 2020, September 10 - 5:53pm

I've seen that you looked for v2.22 here. I've not found it yet, but I've found and uploaded v2.1 instead. This was on MacGui. I let you manage the description of the page. Wink

lilliputian's picture
by lilliputian - 2020, September 3 - 3:20am

very nice! Will you be adding it to this page?

EDIT: Added v1.0.3 from Grenier du Mac!

Realitystorm's picture
by Realitystorm - 2020, April 12 - 9:21pm

I've managed to track down a registered copy of DiskDupPro 1.0.3 hidden on the web.
It works under system 6.0.8 so I'll be adding it to my image files for people starting out with SCSI2SD or FloppyEMU etc.

My images (soon to be updated)

3371-Alpha's picture
by 3371-Alpha - 2017, March 7 - 2:42am

So when you say this can replace disk copy, do you mean I can delete disk copy to save hdd space? Also how does this compare to ShrinkWrap?

jdmoser's picture
by jdmoser - 2015, February 8 - 7:21am

This is perfect for creating and writing images for your 400k and 800k floppy Macs... even more so on a newer OS 9 machine with an internet connection and a floppy drive, like the Power Macintosh G3. Totally invaluable.

MikeTomTom's picture
by MikeTomTom - 2012, May 1 - 1:29am

A little known tid-bit (perhaps): This has to be the only disk imaging software I know of that can mount Disk Copy 4.2 (and its own DiskDup+) floppy disk image files onto a System 6 desktop, like Disk Copy 6 & ShrinkWrap can in Systems 7x - 9x. - Gets 5 stars from me for that, alone.

[Edit]: exception - "MountImage" can also mount Disk Copy 4.2 image files onto a SSW 6.x desktop.

Balrog's picture
by Balrog - 2010, September 30 - 9:16pm

Please add v1.3.2a to this page anyway. Smile

Balrog's picture
by Balrog - 2010, September 30 - 9:14pm

The one and only utility that can overcome copy protection is Copy ][ Mac. But it can't create images, only duplicate disks. Sad If anyone wants it I can upload it (I have most of the versions).

Edited by IIGS_User: Copy ][ Mac link added Wink

bertyboy's picture
by bertyboy - 2010, September 30 - 7:51pm

I've found a copy of DiskDup Pro v1.3.2a. do you think it has more features than this one ? Hoping it can overcome some of the copy-protection used with bad sectors on floppies.

I'll check it out in vMac and give it a check with Disinfectant, if it's not the same as this one, I'll add it to the page.

xy's picture
by xy - 2010, September 23 - 10:15am

Yeah, but DiskCopy 4.2 does not work on Mac OS 9.2.2. DiskDup does.

Balrog's picture
by Balrog - 2010, September 22 - 9:17pm

Better to use Disk Copy 4.2. Smile

Attila's picture
by Attila - 2009, December 22 - 6:02pm

I've added an AutoTyper to the archive, so that DiskDup+ images that have lost their file type and creator information can be opened by DiskDup+ again. For some reason it won't give you the option of opening them even though they're still good. Now, just drag and drop onto the AutoTyper and everything's A-OK!