Apple iMac Firmware
Apple iMac Firmware
4.1.9
4.0
0.0
HomeSystem UtilitiesApple iMac Firmware
Apple iMac Firmware free download for Mac

Apple iMac Firmware4.1.9

25 September 2001

Firmware for slot-loading CD/DVD iMacs.

Overview

Note: Apple iMac Firmware is no longer under development, but is still available for download.

The iMac Firmware Update 4.1.9 will only run on iMac computers with slot-loading CD or DVD drives running Mac OS 9.1 from a local drive. If you are using Mac OS X you must boot from a local Mac OS 9.1 writeable partition (not a CD, or network disk) prior to following the update instructions.

Firmware Update 4.1.9 includes improvements to starting up Mac OS X from the local hard disk, Firewire target disk mode, starting up from the local hard disk, network startup, and system stability. This update also adds support for additional security options which allow the Open Firmware to be password protected.

People report that this firmware update has also freed up their missing RAM slots, which were lost in the last iMac firmware update.

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Robcarlo
Robcarlo
Jun 20 2007
4.1.9
0.0
Jun 20 2007
0.0
Version: 4.1.9
okay i have an imac 333 tray loading running 9.2.2 and macos 10.1.5. i wish to install 10.3 but it won't upgrade. i've checked the firmware upgrade which is 3.0 and all seems to be okay. when i put the 10.3 cd in the drive it goes straight to a grey screen saying apple firmware ok. i then type boot-cd and nothing happens. can someone help please. as i only want to set up this machine purely for email and web.
Guest
Guest
Jul 26 2004
4.1.9
5.0
Jul 26 2004
5.0
Version: 4.1.9
I dont know what all these people below are talking about,I had no problems with this update....I think you should learn more about computers and read the instructions before you criticize apple.
Guest
Guest
Mar 20 2004
4.1.9
5.0
Mar 20 2004
5.0
Version: 4.1.9
I don't have os9. I have os 10.2 run perfectly but i want to install panther. how??
Guest
Guest
Jun 7 2003
4.1.9
5.0
Jun 7 2003
5.0
Version: 4.1.9
BE CAREFUL! Applied this update and ran into the same problem as Steve - third party RAM is 'gone'. Used to have 320 MB of RAM, but after this update a 256 MB chip can't be seen. Thanks Apple.
Guest
Guest
Oct 6 2002
4.1.9
5.0
Oct 6 2002
5.0
Version: 4.1.9
I installed the imac 4.1.9 firmware and now my hp printer can not be seen by my computer. Can't find any help on this, can you help?
Guest
Guest
Mar 1 2002
4.1.9
5.0
Mar 1 2002
5.0
Version: 4.1.9
CAUTION! After loading this firmware update on my iMac DV SE (400Mhz), I was no longer able to boot from my VST FireWire HD. Upgrading to 9.2.1, then to 9.2.2 made no difference. I can still mount the FW HD however.
Guest
Guest
Sep 26 2001
4.1.9
5.0
Sep 26 2001
5.0
Version: 4.1.9
MacOS 9.2.1 definite improvement of speed and stability thus far-great download.
Guest
Guest
Apr 1 2001
4.1.7
0.0
Apr 1 2001
0.0
Version: 4.1.7
VERY DANGEROUS. This is an update that for many machines makes 3rd party added RAM disapear. Additionally, Apple has told me that it is "our " problem. Very disappointing. Clearly we put faith into things that are recommended by them at Software Control panel and their update pages. Many of us had perfectly smooth running machines. and this has created a myrid of problems, such as non function of Virtual Memory in addition to not recognizing added memory. Apple's suggestion : "buy different memory". Very sad. DO NOT DOWNLOAD THIS
Guest
Guest
Mar 24 2001
4.1.7
0.0
Mar 24 2001
0.0
Version: 4.1.7
A huge impovment!! I have found Mac OS 9.1 to have inproved in stability. Also memory performance has increased. A must have update!
Guest
Guest
Mar 24 2001
4.1.7
0.0
Mar 24 2001
0.0
Version: 4.1.7
A huge impovment!! I have found Mac OS 9.1 to have inproved in stability. Also memory performance has increased. A must have update!
Free
4.0
0.0
App requirements: 
  • PPC 32
  • iMac slot-loading CD/DVD model only
License: 
FreeAbsolutely Free
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