Product: ExpressCArd to PCI; Cardbus to PCI
Computer Platform: MacBook Pro
Operating System: MaC 10.4.x AND 10.5.x
CPU Spikes up causes malfunctions on Application, this is happening when using 2slot, 4 slot and 1 slot PCI units and 1slot PCIe unit connected to MacBook Pro.
This is a bug - Apple related issue.
We found this link: http://www.ableton.com/forum/viewtopic.php?t=88815
That tells you on how to fix this CPU spiking up causing problem with any PCI Cards in the chassis "According to the apple forums, to fix it.
You have to download the AirPortExtremeUpdate2007004, use pacifist to extract the ktext file thing and drop it into the corresponding folder on the mac hd.
This is the actual link to the forum: