Hi there,

I've just upgraded from 2gb to 4gb ram, everything is fine in the bios etc and will boot into Vista no problem.
However when I try to boot into my Leopard installation it gets to the white screen with the apple logo in the middle and then stops and does nothing.

I tried using the -v command to boot and basically it just starts MAC framework and then stops.

Anyone had this problem before or know what could be causing it?

Thanks

Probably not but... in "About This Mac" it identifies my system as an iMac which I assume would only have 2 dimm slots on the board. It wouldn't be an issue with using more than 2 dimm slots causing this would it?

On a side note is there anyway to change what machine the Mac is identified as or to change it saying the memory is running at 800mhz instead of 667mhz?

This is what it hangs on:

MAC Framework successfully initialized
using 16384 buffer headers and 4096 cluster IO buffer headers
IOAPIC: Version 0x20 Vectors 64:87

Ok well after hours of searching I managed to fix it.

Not sure which thing did it yet but I used the "himemory_mode-0" command at the bootloader which enables more memory to be used apparently.

I also installed a different AHCI kext and removed AppleIntelCPUPowerManagement.kext at the same time but don't know if they made any difference.

Back to the drawing board...

After a reboot it won't work again so I have no idea why it did before :/

Doesn't anyone know?

Hello Goymer!

I'm sorry to reply without clear solution about this problem.

Actually, I'm stuched this same problem for a long time and searching a solution.

If you agree with me, it is far better that you and i compare our H/Ws or S/Ws to get the problem solved.

Below is my H/W specs.(LAPTOP)

CPU : Intel T8300
RAM : DDR2 PC3200 2G*2 = 4G
M/B : PM965+ICH8(82801H)
Video : Geforce 8400M 128MB
Sound : Realtek (onBoard)
HDD : WD 500GB, WD5000BEVT

My tries.

1. Kalyway 10.5.2 -> well installed and run

2. boot-132 + retail 10.5.6 -> IOAPIC : failed, Version 0x20 vectors 64:87

3. Boot with external HDD(OS: Kalyway 10.5.2), then install retail 10.5.6 to the internal HDD after installation, I also installed chamelon 2.0 RC2 640 : failed, Version 0x20 vectors 64:87

4. same process with #3 but i used boottink: failed, Version 0x20 vectors 64:87

Question.

Have you tried to pull out you RAM Module and use it just 2 giga bytes? your original problem is that you can't boot after you installed another ram module.

Reply me pls~~ thanks.

Hello Pinebanana, thanks for replying.

My H/W specs are:

CPU : Intel E6750
RAM : DDR2 PC6400 1G*4 = 4G (2 x Geil, 2 x Corsair)
M/B : Asus P5Kc (P35) J micron & ICH9
Video : Geforce 8800GT 512MB
Sound : Realtek HD (onBoard)
HDD : Hitachi 7K1000.B 1TB, Samsung F1 750GB

Installed with iAtkos 7, all fine until I add the extra 2GB ram, even fails if I add 1GB to make the total 3GB.

It boots perfect if I just use any ram to make 2GB total.

I managed to fix this issue by finding this thread and installing the modified JMicronATA: v0.6 and AppleATIATA: v0.1 kexts.

This seemed to work at first but then randomly after a reboot or shutdown it would fail to boot again, I think this had something to do with after I used my windows partition it would fail to boot again.

Then I backed up my system and installed the oem 10.5.8 update via apple update, rebooted and now the system works fine with 4GB!

I have yet to go back into my Windows partition just incase it goes wrong again :/

Hope that helps, let me know.

Hello, Goymer!

first i'm so sorry about late reply your fine instructions. and Thank YOU!

I'm going to fix the problem with your solution, and I promise you to tell about the consequence.

Thank you again and wish me luck!