Mac Pro - Yosemite - iMessage won't connect

Mines getting pretty unreliable. I physically decided to do a full fresh install over the holiday break. I was having beach balls constantly. I couldn't hardly type in safari without it taking 3 - 6 seconds between words. iMessage would randomly just drop all my connections and would fail to reconnect. Random desktops were opening I never opened. Half the apps that were open get stuck on a reboot "Application not responding".

I found another issue with iCloud, where all my accounts got garbled up. Mail was using the wrong SMTP settings, so its great to have mail your sending from one domain get re-routed to another domain so it looks like you sent it from your work account. After cleaning that mess up, my media center was running at 80 degrees celsius for the last week. I go in and some iCloud sync process is stuck at 102% CPU.

I wish I didn't even update. Even a clean install is not working right after a few days. I've tried repairing permissions, resetting PRAM three different times but I don't think this OS was ready for game time. Seems like the fastest computer runs as quick as the slowest service.

Set your Date and Time to automatic!!! Top right hand corner, Open Date & Time Preferences, and make sure you're in the proper time zone... mine would just spin for hours and never log in, guess it couldn't locate me properly...

cybercussion--

I don't think this OS was ready for game time

Most Users would disagree with you. You did not specify what model you are running, but Mac OS X is not particularly taxing for most computers, and your experience is not typical. I think there is something wrong with your computer or its software.

If you want to work on that, start a new thread with an appropriate title, and readers will help you look for common problems and speed up your Mac.

I'm still having this problem... was hoping an upgrade to Yosemite would fix it... it didn't.

Tried everything on this thread, still "network connection" issue.

Running a 2008 Mac Pro w/o wifi, got that hard ethernet connection.

You did the PRAM restart? Did you set your date and time to automatic?

Yes. Still doesn't work.

I have tried all things on this post and nothing is working. However I can use iMessages perfectly on my Guest account

Thanks, it really helped me after trying everything ...

I have a late 2009 MacPro running 10.10.2, ungraded to .3. Around the first of April I started getting messages that I wasn't logged in to FaceTime. I didn't bother to do so, since I wasn't using FaceTime on my Mac. Then, some 10 days later Messages stopped working. Then, I got a message that I needed to log in. First, I logged into FaceTime, which went ok. Then, I entered my password for Messages, and there was a delay as it tried to verify the password, before responding that it was unable to verify the password and that I should check my network connection and try again later. In the meantime, I downloaded the 10.10.3 upgrade, thinking this might help. Still, the problem persisted for several more days, never rejecting the password as invalid, just repeating that it was unable to complete the process, that I should check my network connection, and try again later. Meanwhile, I had no problem with Mail or any other app requiring an Apple password, including on my iPhone or iPad.

I then found this thread and tried all the approaches suggested above. None worked. However, the good news is that after several shut downs and restarts, Messages finally validated my password and is working fine. However, that was last night, and this morning my iPad required Apple password entry to send mail. I doubt I'll have problems with this password, but it tells me this problem has something to do with Apple's cloud security.

RightOn Stevie Years Wonder!

Worked for me... BYW, spent a few hours with apple tech on phone, to no avail....

HALLELUJA!!!.... I FINALLY figured this out.

tl;dr: Make sure you set "Date & Time", as well as "Time Zone" automatically, NOT manually.

I've had this issue for months but I simply chose to ignore it due to more pressing matters. I sincerely thought that the only way I could get rid of the problem was to factory-reset my computer....

Luckily, it was actually another bug that tipped me off on what might have been the problem:

I was receiving emails on the "Mail" app on my Mac that would say "Tomorrow" instead of a normal received "time stamp".... it was obviously bizarre, but again, I'd ignored it due to lack of time, and the relative minor issue.

Running a small hostel in Cancun, Mexico, I received a booking confirmation via Booking.com that caused a lot of issues due to the fact that the email said "You have a booking for tonight", when in reality, the booking was for tomorrow. This piqued my interest enough to look into the date and time/time zone issue, and I realized that for some reason, my computer was set to the timezone of "Shanghai", and that I had (for some reason) changed the time manually to reflect the correct time on my Mac. This seemed to bug-out quite a few apps which seem to draw on this information.

The original reason for me playing with the time on my Mac was that Cancun legally changed timezones back in February, so there was a moment after the legislation passed that both Google AND Apple were giving people the wrong time. Clients were even checking in saying that no one (not even pilots on intercoms upon landing), were 100% sure what the local time it was.

When I set my time zone to "Cancun" just now, my computer still displayed the wrong time, but when I set the "Date & Time" setting to automatic, much to my surprise, it corrected itself!

This was the "aha!" moment I had for iMessages. I figured that maybe, I could never log-in because iMessages might be trying to sync different times at the same time, causing it to continue on an infinite error-loop, and thus, never log on.

As we all know, much to my relief, this was the issue, and while this really is a "first world problem", it was definitely REALLY annoying to not be able to share information via one platform/device.

So once again:

Click the apple at the top-left > System Preferences > Date & Time > Date & Time Tab > Check box "Set date and time automatically"

Then: > Time Zone Tab > Check Box "Set time zone automatically using current location"

- David

Tine and Time Zone being correct is included in this link

Get help signing in to Messages, FaceTime, and Game Center - Apple Support

which is already referenced in the article

The article includes

Check your settings

Make sure the date, time, and time zone are set correctly in Apple menu > System Preferences > Date & Time. You can also select "Set date and time automatically" to keep this information accurate.

While that is true, I know that I, like many people probably simply assumed that time was correct since.. well, the time on my machine was correct.

I now truly believe that the conflicting time zone and date information was what probably stopped *my* Messages app from working.

It stopped working soon after the time zone issue and an OS update, and now only worked after I adjusted my timezone settings.

All I can do is re-insist that everyone triple check that both settings are set to 'Automatic'.

- David

Not sure this if this might help but, I assumed that I had to re-enter my credentials in iCloud settings under system preferences. I later found out that I should have gone to Messages and then preferences. I changed my password earlier in the day and it caused iMessages on my Mac to disconnect.

That worked for me, thank you.