Stuttering Mouse Cursor During Network Usage

Question

I just recently purchased an Intel Mac Mini, and have noticed an issue with my Apple Bluetooth Mouse. Whenever there is any network activity, the responsiveness is horrible, and the cursor keeps skipping and stuttering across the screen when I try to move the mouse.
I was previously using this mouse and keyboard on a Blue G3 with the D-Link USB adaptor, and never experiences any of these problems, so I know it is not the mouse or keyboard.

Answer 1

Hi, Byron and Al —
Welcome to Apple Discussions.
If you haven't already, you may be interested in reading through joelmcafee's Bluetooth: Not Available/intel macbook pro thread — though he hasn't posted a resolution yet.
A few questions that may engender ideas:
(a) Have you contacted AppleCare, either by phone — or, for Al, using the "Chat with a support agent" link on the iMac (Core Duo) support webpage? They may be able to help.
If the problem isn't solved during the conversation, you'll be given a case number for use at an Apple-Authorized Service Provider (AASP) — limited to authorized hardware problems) or for future reference. If the problem persists, your subsequent call(s) may be forwarded to higher-level support folks ("product specialists"). AppleCare Tech. Support is also one means that helps Apple to recognize widespread problems and focus their engineers on finding solutions — and they certainly need to know if the Bluetooth implementation in Intel-based Macs is awry in some way.
(b) Does "any network activity" reflect WiFi, a router, Bluetooth internet connection, or...? By "any" — I assume you mean any at all?
(c) Is the "activity" reflected in any of your system.log, console.log, ipfw.log, netinfo.log, etc. entries? Is there a ~resulting message about Bluetooth's "handshake," etc.?
(d) Are Bluetooth File Transfer / File Exchange enabled? Are any Bluetooth ports open?
(e) Have you done a careful review of potential 2.4 GHz RF interference? What other Bluetooth-enabled devices do you use?
(f) Does manipulating the mouse tracking/scrolling speed settings in System Preferences »» Keyboard & Mouse »» Mouse help at all?
Fyi, I've been experimenting with a 3rd-party mouse driver that's Bluetooth-compatible, named SteerMouse. So far, it seems to have excellent and stable mouse acceleration & speed controls... But that's probably tangential, since your description of the symptoms sounds related to signal, or connection, or — etc...
That's all for now. Please post back to discuss further — perhaps we can come up with something.
Warm regards,
Dean
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