Note updating your iMac's firmware needs to be done in Classic Mac OS, running version 9.1 or later. When a message says your computer's firmware has been successfully updated to version 4.1.9, you are finished. The update starts automatically.Ī status bar shows the progress of the update. Release the programmer's button when you hear the tone. Continue to hold in the programmer's button until you hear a long tone. While you hold in the programmer's button, press the Power button to start up your iMac.ĥ. The application also invokes IAP and setfrofrequency functions i. You may need to use a pen or a straightened paper clip.Ĥ. Thank you for your swift response Diego That is correct but to clarify we do not use or care about the actual ROM bootloader (ISP mode) but only about the memory usage of the ROM startup code up to entering the application in FLASH. Locate the programmer's button on the side of the iMac, to the right of the reset button. When prompted, click Shut Down in the dialog box to shut down your iMac.ģ.
Mactracker boot rom version mac os#
If a message says you need to install Mac OS 9.1, the firmware updater will not run until you install Mac OS 9.1 or later.Ģ. Note: If a message says your firmware is up-to-date with version 4.1.9 of the iMac Firmware Updater, or that this version of the iMac Firmware Updater will not run on this computer, then you do not need this update. Double-click the iMac Firmware Updater icon. See Mac Help, available in the Help menu, for more information on changing your control panel settings.ġ. This may reset some of your control panels to default settings. Note: After you install this update, the parameter RAM (PRAM) is reset. You may want to print them for reference. This update also adds support for additional security options which allow the Open Firmware to be password protected.īefore you install the iMac Firmware Update 4.1.9, read the instructions below.
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If you are using Mac OS X you must boot from a local Mac OS 9.1 or later writeable partition (not a CD, or network disk) prior to following the update instructions.įirmware updates are also available for Power Mac G4 and Power Mac G4 Cube models.įirmware 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.
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 or later from a local drive.
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