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User profile for user: asulaiti
asulaiti Author
User level: Level 1
4 points

Mac OS 9.2 Not in full screen

Hi,

I just bought iBook G3 800Mgz from ebay, to run Mac OS 9 with old apps to open some old documents.

However, the iBook G3 work prefect with Mac OS 9.2.2 & Mac OS 10.4.11 ..
just one problem that Mac OS 9 doesn't run in full screen !!

I prefer to startup from full OS 9 rather than running as a classic sys under Tiger or Jaguar OS, ..

When I startup from OS 9, the startup operation work normally full screen with Mac OS 9 logo window appear for 2 second, then the screen becomes small during the startup processing, and the OS 9 continue complete the startup with the same size.

After several trailing to solve the issue but without effects, I discover where is the problem but can not fix it .. the problem with OS 9 feeling there are external monitor so it gives for that monitor full 1024x768, and on iBook screen 640x480 .. I found this on control strip with monitor control panel, also when I run the monitor control panel it's give me two windows, a window for each display !!

The picture below explain more with I mean .. OS 9 desktop with half size of screen and center of the display.

it's exactly same thing happen when you connect your mac with projector, even your screen support until 1280x800 for example, but the projector just 800x600, you will see your desktop on your laptop decrease with a large black frame ..

Now, with all my discretion, I didn't figure out where is the problem that push my iBook feel there is another monitor .. I tried remove some extensions and reset prm but no effect.

Please help and Thanks in Advance.

MacBook Pro 15 i7, Mac OS X (10.6.5)

Posted on Jan 16, 2011 2:38 AM

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9 replies
User profile for user: Don Archibald
Don Archibald
User level: Level 10
101,623 points

Jan 17, 2011 12:07 AM in response to asulaiti

Hi, asulaiti -

For some reason the image you provided a link for does not load on my machine, so I'll work with your verbal description.

Based on similar reports and problems posted in Discussions, the usual cause for that problem is that the OS 9.2.2 system was copied from another model. Generally such are not bootable, although they will work fine in the Classic mode - which is the usual reason to have copied them.

Sometimes they are capable of booting the machine, but will result in a reduced-size image on the monitor. This is usually a result of an incompatibility between the extensions available in the OS 9 System Folder and the machine's hardware.

Things you can try -

• Throw away the Display Preferences file and the Monitors Preferences file. Both of those can be found in the Preferences folder in System Folder (the second one, Monitors Preferences, is in a folder by the same name - throw away the file inside, not the folder). I suspect this will do little good, although I hope it will; it will not hurt to try it.

• Find someone who can give you a full set of monitor extensions compatible with your iBook.

• Re-install OS 9.2.2. Unfortunately, an 800MHz iBook G3 requires a model-specific version of OS 9.2.2 for booting, available only from the OEM combo disk set that originally shipped with the machine when it was new. If you did not get that disk set with the machine, it may be difficult to find.
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User profile for user: Don Archibald
Don Archibald
User level: Level 10
101,623 points

Jan 18, 2011 11:34 PM in response to asulaiti

Hi, asulaiti -

Now I figure out what's the problem, I tried to remove Display Preferences & Monitors Preferences files. But nothing change.


I thought that would probably not help. The problem is with some of the specific files (probably extensions) that are needed by the hardware on your iBook G3 - the ones you have are intended to support different hardware, hardware that is specific to the other model.

You will need to replace the applicable files with ones compatible with your machine. Two ways to do this -

• Locate someone who can furnish you with copies of those files. I don't know for sure, but I suspect they would include all extensions whose name starts with ATI.

• Re-install the OS 9.2.2, using an original disk set intended for your model. As I mentioned previously, this may be difficult to find. A retail (or universal) OS 9.2.2 Install CD was never released; the only install CDs for OS 9.2.2 are model-specific ones.

As far as sources go, you might check with an Apple User Group - most large cities and universities have one. This Apple support page may help in that regard -
http://www.apple.com/usergroups/

You may be able to find an appropriate disk set on places like eBay, but chances of doing so are slim - and you need to be careful that you get what you need.

You might also check back with the seller of that machine - ask them for the original disk set for it (that disk set really belongs with the machine).
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User profile for user: Simon Teale
Simon Teale
User level: Level 5
4,684 points

Jan 19, 2011 12:50 PM in response to asulaiti

I managed to get this (only once) on my iMac G3 perhaps 10 years ago, so excuse me if my memoried are not 100% accurate.

It happened when I changed from booting into OS9, booted into OSX, changed the monitor resolution UP, then rebooted into OS9. OS9 booted at the old resolution, but in the centre of the screen like you.
I think I fixed it by booting back into OSX, chnaging the resolution back to what was used in OS9 (maybe from 1024x768 back to 800x600), then rebooting back into OS9.
I no longer have the iMac G3, so I cannot attempt to replicate it.

Don't know if that's the same for you, r if doing this will work. Resetting the PRAM may help the issue with the ghost second monitor.
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User profile for user: asulaiti
asulaiti Author
User level: Level 1
4 points

Jan 20, 2011 12:51 AM in response to asulaiti

Hello all.

FINALLY .. solve the trouble .. Wow .. it's was really a nightmare !!

Fortunately, I was made backup for my old PowerBook G4 1Ghz Ti restore disc before sell it since about 5 years, the disc comes with Mac OS 10.2 sys restore files & OS 9.2 via a copy way, I found it in a hidden disc image with name (Mac OS9 General.dmg) and by it name you quickly know it's as universal OS 9, and really, it's work fine with my iBook G3 .. I feel lucky.

Thanks for everyone post his ideas and suggests in my topic.

Have a nice OS 9 for all 😉
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Mac OS 9.2 Not in full screen

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