An update, I have started my computer in Safe mode, but the behaviour of the mouse is the same.
I have reset PRAM and NVRAM, still no improvement.
An observation from me:
During startup, when I get to the blue screen, the mouse cursor stays in the upper left corner. It stays there until the progress bar reaches the end. Then it jumps to the new position... I can move it from there, but it jumps back after a second
I'm guessing you do not have another account you can login to?
Does it boot to Single User Mode, CMD+s keys at bootup, if so try...
Repeat until it shows no errors fixed.
(Space between fsck AND -fy important).
Resolve startup issues and perform disk maintenance with Disk Utility and fsck...
Does it boot off your Install Disc & the mouse works OK?
Can someone give me some tips on how to operate the computer with the keyboard?
I you had Mouse Keys set in Universal Access, you could press the Option key 5 times to have the Keyboard used for Mouse functions.
Let's see where we are after the above tests.
Oh, do you have another Mac around with Firewire?
Hello Jeroen Akershoek,
the cursor also starts in the top left for me but to
jump back is not normal. Have you tried a different USB
port and get same results or plugging in mouse after
Here are the Keyboard Shortcuts:
Hope this helps.
I tried a different USB port and that helped. But I soon realized that the problem isn't related to a USB port, because I had to remove my tablet from the other port.
I know now what happened. My tablet is connected to my computer, but I don't use it very often so I've pushed it out of sight and only grab it when I need it. I have a sleepover cat this week and I remember that it jumped on my desk where the tablet is. It isn't allowed to do that so I chased it off. At that point the pen must have moved across the sensitive area
Thanks for your help!
I had the exact same problem with the behaviour described and almost called techsupport. I aint saying that this was your problem too, cause its kinda dumb, but my problem was this:
I have a wacom tablet and I left my pen on it. Id didnt do anything till restart, but then it woke up and started to reposition my cursor repeadetly, because the pen remained in the same position.
So you might have a serious problem, or if youre dumb like me, it can be solved really fast: Check your tablet