Bluetooth problem with OSX Yosemite: Magic Mouse and Keyboard

I have the same issue on a MPB Retina mid 2012.

Before the Yosemite update, BT was perfect with my Microsoft Mouse comfort, now there is also a lag of 0.5 second after every micro inactivity, which is very annoying.

I have tried the PRAM reset, seems to have resolve the pairing issue but not the delay.

I have to admit that latest updates from Apple was not as good as before: on my iPhone 5S, wifi is now very slow (with 8.0.2) and most of the time unstable.

Now on my MBP, the BT issue....

Had the same issue this morning and have been able to resolve.

I updated my rMBP to Yosemite 10.10 at home over the weekend and when returning to my office desk this morning, was surprised to find that my Apple bluetooth devices (magic-mouse and trackpad and keyboard - all Apple) connected to Yosemite without me having to do anything. So the bluetooth id's of these devices must be being stored in the PRAM I think because I did a complete reformat of my disk and a fresh installation. None of the old preferences regards bluetooth were migrated across.

So, reading previous posts, I first removed all three devices from the bluetooth system preference panel, rebooted, immediately held down CMD+ALT+P+R to reset PRAM, waited to hear the 2nd chime, let the machine boot and added mouse, trackpad and keyboard back again.

So far, so good. Hope that also works for others. Hope Apple can resolve this in a future update, quite an oversight as many seem to be suffering and it's all Apple products in use!

And what about the lag? It is disappeared as well?

For some reason this issue has resolved itself.......Nothing changed just came good 😕

Well, yes everything *was* fine when I wrote that last post and had been for about an hour.

But.. i've since had the mouse lag come back, briefly and go away again. It's clearly better than it was before I cleared the PRAM but i've had the lag again. Rather disappointing.

What experience did you have?

a 0.5 second of latency, lag. This happen when the Macbook is not plugged with battery charger. When he is on charge, the problem don't exist. I heard that some people have already notified this issue to Apple when the system was in Beta, but it seems not solved yet. Waiting for a fix coming directly from Apple, I hope.

I've gave the Pram a try. Deleted all the old connections from the bluetooth preferences, restarted CMD+ALT+P+R restarted connected the mouse almost immediately and work's just fine , no lag or anything. I also did a couple of tests, closed the mouse and waited for about 2 minutes put the mouse on, and it took the bluetooth about 45 sec to reconnect after i pressed on it a couple of times, restarted the computer with the mouse on and off, and in all cases it reconnected.

In my bluetooth preferences at this time there's only the mouse connected.

Same problem here. MBP Retina, 15-inch Late 2013. After the update the bluetooth mouse was completely unusable. It would bounce around and lag and stagger to complete frustration. After reading around I unpaired and re-paired and the problem went away for a day or 2 but is back again now with a vengence. I’m about to unpair and repair again.

feel so bad! my trackpad have delay every 5 second

I have removed all the BT devices, clear the PRAM and do the pairing again but nothing change.

I have only connected my mouse and the moving of the cursor is not smooth.

However, if I plug my power adapter to the MBP, the mouse is smooth as before, no lag on micro idle.

So, it is clearly linked to the power management of the BT.

On Windows, there is a settings for that: device manager, right click on bluetooth and display property. select power management tab (most right) and untick 1st box.

Is there something equivalent on OSX ?

it’s definitely more complicated than just happening or not happening. I get it a lot in Safari if pages are loading or if the pages are complicated. I get it less in other apps that aren’t doing anything stressful. I wonder if it is related to a bluetooth or other energy savings settings. I comes and goes and is not permanently fixed by repairing or rebooting. Though those will get you some time usually to work without annoyance. I am not having any trouble with the bluetooth keyboard yet, but the mouse is sometimes extremely frustrating.

Yes, this is a huge issue. It seems like when you let the mouse or keyboard sit for a few seconds, the issue is prominent on the first interaction (0.5s delay, as described above). After that interaction however, the mouse and keyboard seem to respond pretty well—until that is, you pause again. The issue seems to "reset" itself after a pause in use of over 1 or 2 seconds, if that makes any sense.

James Sentman wrote:

it’s definitely more complicated than just happening or not happening.

I agree. Following up on my previous post, now that I took my macbook (macbook pro retina 13", early 2013 model) away from the house, connected to another wifi, everything was great and the magic mouse worked very well UNTIL I opened Safari. The magic mouse immediately quit working all together, and will not reconnect AT ALL. I don't usually use it, so it's no giant deal for me, but this is definitely a bug that's more involved than a simple reset.

While it hasn’t solved the problem completely, my lagging is now reduced to just a few moments when first starting an app or loading a page or when it’s under heavy load working on something. I did 2 things I’m not sure which made any difference. First in the bluetooth preferences I turned on the reception of files over bluetooth thinking perhaps that would keep the blue tooth background helper app awake listening for those kind of connections. Then I reniced the “blued” app in the background to the highest priority though i’m not really sure that made any difference. You can do this by finding it’s process ID with the activity monitor and then in the terminal doing a “sudo renice -20 (the id you got from activity monitor)” -20 is the highest priority.

My machine is still frustrating on occasion but seems more usable. That renice wont survive a reboot, so if thats what did it you’ll have to do that again after rebooting. It’s worth a try.