XPostFacto
XPostFacto
4.0

4.8

XPostFacto free download for Mac

XPostFacto

4.0
06 September 2005

Install OS X (up to 10.4) on unsupported PowerPC Macs.

Overview

XPostFacto... While Apple has limited its support for Mac OS X to those machines that originally came with a G3 or G4 processor, it is possible to install Mac OS X on some earlier machines. The unsupported machines that work now are the 7300, 7500, 7600, 8500, 8600, 9500 and 9600, as well the clones that were based on one of these systems (the Umax S900 and J700, and the Power Computing PowerWave and PowerTower Pro). The original processors in these machines will work (with the exception of the 7500, which requires a processor upgrade). G3 or G4 upgrade cards work as well. Other models that use the PCI architecture may be made to work in time

What's new in XPostFacto

Version 4.0:
  • Supports Mac OS X 10.4 (Tiger)!
  • Runs on Mac OS 9.x or 10.2 through 10.4.
  • Will install Mac OS X 10.2 through 10.4.
  • Works with "New World" machines that Apple dropped support for in 10.4 (such as the original iMac, original iBook, and the Lombard Powerbook).
  • Avoids the mis-application of the 8 GB limit on "Old World" machines by the Mac OS X Installer.

Join over 500,000 subscribers.

Subscribe for our newsletter with best Mac offers from MacUpdate.

110 XPostFacto Reviews

See all

Rate this app:

Anonymous
22 July 2002

Most helpful

Thank you, for writing, coding xpostfacto for me. I could not have installed osx without it. I have updated osx and have not encountered any gliches until 10.1.5 when I have had to logon as a user. I have never been anything except an admin. Is this an update to the coming jaguar update or an other charge which I will have to incur to keep my mac.com name.
Like
Version 2.2b14
Wts
06 April 2014
I have used XPostFacto many years ago to trick an 8500 to think it could run OS Tiger. It did the job albeit the 8500 running OX Tiger was SSSLLLOOOWWW. Todays problem for me is that when i click the download button on this page it comes up as an all text page. What the...???? How do i get an executable application rather then a all text page(s) ?
Like
Version 4.0
Woofer
28 September 2007
I'm just wondering/hoping, if this niffty little programme might be updated soon to let users with under 900MHz G4 Macs to install OS X 10.5? It seems Apple have limited 10.5 for either Intel users or better than 900MHz G4's Fingers x-ed.....
Like
Version 4.0
Mactinker
22 June 2007
Hi! XPF was recommended to me by a list mod to help in installing 10.3 on a beige G3 AIO. I have asked Apple and they tell me that 10.2 will install and run on this Mac just fine. I went to the list in question looking for 10.2. But the list mod was very encouraging about the superiority of 10.3 over 10.2, so I tried to dl XPF4. I got a page of very strange code, and no actual dl at all. Thought you'd want to know about that. Three questions: 1. Does anyone know what I might have done wrong in the dl process? I clicked the "Download now" button, that's all, and all that appeared to be necessary. Or maybe it can't dl to OS9? 2. If I can get hold of a set of 10.2 CDs, do I still need XPF? (Apple says no, just fyi, but if *users* have different actual experience, that's helpful to know.) 3. (Slightly OT) If I could just go altogether with X I wouldn't ask this, but: Does anyone have an opinion whether 10.3 is really so much better than 10.2 that I need to add to the complication of making the switch? It's going to be tight in the first place, as I need to partition the HD so I can have one side w/ OSX and the other w/ OS9, because I actually do use the built-in floppy and zip drives, both unsupported under all versions of X. Can't go get a USB floppy drive, because the AIO does not have USB ports, which are required by 10.3. Thanks for your time.
Like
Version 4.0
Anonymous
04 November 2005
hi, this utility is great, i was able to run the cd installation of mac os X 10.2 in my Power Macintosh 8600 but i had a problem, everything was fine running the installation until i had to choose a selection disk for the installation, the program said that "you cannot install MacOs X on this disk. An erlier version of Mac Os X is not installed" can anybody help to solve this problem? what can i do????
Like
Version 4.0
5 answer(s)
Anonymous
Anonymous
04 November 2005
You can go here for help.
Like
Version 4.0
Anonymous
Anonymous
05 November 2005
thanks, but i still couldn´t find the answer for my problem :(
Like
Version 4.0
Anonymous
Anonymous
05 November 2005
Did you try the using the forum there? You can ask questions there, or you could email the developer.
Like
Version 4.0
Sitzar1
Sitzar1
18 November 2005
If you don't have a G3 or G4 upgrade card installed on your 8600, then OS 10.2 isn't going to install. The makers of XPostFacto posted that on their site. If you do have one installed, I have no idea why 10.2 (or 10.3 or 10.4 for that matter) won't install.
Like
Version 4.0
Mactinker
Mactinker
20 June 2007
Is it possible that the cds you are using to install from are updates? You didn't mention what you're running on the computer now - is it a version of X or is it older? When I've run into problems such as you describe, it's usually been an update installation, not a clean install. This would put the situation out of the realm of XPostFacto and back with your OSX source.
Like
Version 4.0
Paynito
09 October 2005
Just installed 10.4 on Lombard 400MHz/320 MB, cannot shutdown cleanly, it hangs on "double kernel panic, I'm hanging here" any ideas? -- I was a very happy user of Xpostfacto on my 9500/g4450 with 10.3
Like
Version 4.0
1 answer(s)
Paynito
Paynito
27 November 2007
Well, killed the 9500 trying to go from 10.3 to 10.4. Remember 10.4 needs a newer video card than came stock on the 9500. Now I can get it to boot into os9 with the original processor, but can't get it to recognize the g4 upgrade. I have a floppy disc called "Reset DMUD see upgrade" but I don't remember exactly what order to jump through the hoops. Oh, well. I really like this 9500, great machine after all these years.
Like
Version 4.0
Anonymous
09 August 2005
Question: Can model specific OS X 10.4 be used for upgrades? (Those for eMac are cheaper.)
Like
Version 4.0b5
2 answer(s)
Anonymous
Anonymous
05 September 2005
No.
Like
Version 4.0
Faust
Faust
17 April 2006
TiberiusOsX wrote: "On the contrary, while modification is required, the use of model specific discs is completely feasible." What is this modification? Where is it described?
Like
Version 4.0
Anonymous
12 July 2005
Cool! Give this genius the 25$!!! Now i have 2 beige G3s running with Tiger, this means a lot of money saved! Thanx!!
Like
Version 4.0b5
1 answer(s)
Nathaniel-Yeong-Leng-Heng
Nathaniel-Yeong-Leng-Heng
06 September 2005
I've been trying many times to install panther on my beige G3 without success. I just am not able to boot up using the installer disk even after enabling Xpostfacto and many of the options. Please help.
Like
Version 4.0
Anonymous
12 July 2005
Yes Yes Yes!!!! Lombard g3 is a go!! Installed without a hitch right over Panther...WAY COOL. Will for sure pay for this one :-)
Like
Version 4.0b5
Anonymous
18 June 2005
Question: Is it possible to do the Tiger install from an external firewire cased drive (Like a DVR-109), or one connected internally on one of those ATA cards that looks like SCSI to the system? Or should I get the CD- version of Tiger? I've had great results with XPF on 10.3.9 and previous. Like the author of iCab 3, who supports OS 8.5+ and OS X with a modern browser, this developer certainly deserves our thanks and support.
Like
Version 4.0b2
2 answer(s)
Anonymous
Anonymous
23 June 2005
I have installed Tiger using my external firewire hard disk. The way I did it is closer to the way described in this article at MacOSXHints. Here it uses an iPod and have it completely erased to become an installer but erasering is not necessary at all. In my case I collected al my folders at one new folder named "My Stuff" and then restored the Tiger DVD image to the external hd without erasering it. My only problem was at booting up from this disk: only worked modifying the Startup Disk in System Preferences. http://www.macosxhints.com/article.php?story=20050524104814419
Like
Version 4.0b4
Anonymous
Anonymous
12 July 2005
yes, you don't have to jump through the hoops that the other guy did, just put it in and tell it to install, it even picks a helper drive for you.
Like
Version 4.0b5
zyad
24 April 2005
i have a 7600 serie with a sonnet upgrad g4 450Mhz 1 Mo of cache and a tempo ata card i have install the 10.2 but i havn't sound and i can't install 10.3 i recive the message panic hang up powermac 7600 with sonnet pci x G4 450Mhz 1 Mo cache L2 2Mo of video sonnet tempo usb firewire ata excuse me for my bad english i am in algeria thank you
Like
Version 3.1