Slowness and the constant spinning wheel on Calendar

[cdwheel]

I've been suddenly experiencing temporary freezes and slowness on my Mac OS X Calendar app, and the spinning wheel is constantly spinning (temporarily the one with the colors, but constantly the one of the internet connection, I'm attaching a screenshot).

I'v restarted my Macbook but I experience the same problem. I bought this Macbook Pro recently, and I'm experiencing this only with the Calendar app.

How could I solve this??

Could have today's OS X NTP Security Update Version 1.0 caused this?

 

[Meister]

If it is synced with iCloud, that could be the problem.

Maybe check if your password works.

 

[cdwheel]

If it is synced with iCloud, that could be the problem.

Maybe check if your password works.

It is synced to the iCloud.
I checked my other devices (iPhone and iPad), and are working normally, except that when I make an event change in Mac OS, it wont show the update in my iOS devices. It will, only if the change I made is from my iPhone or iPad.

 

[Meister]

It is synced to the iCloud.
I checked my other devices (iPhone and iPad), and are working normally, except that when I make an event change in Mac OS, it wont show the update in my iOS devices. It will, only if the change I made is from my iPhone or iPad.

Sounds like your mac doesn't properly sync with icloud.

 

[cdwheel]

Can anyone please help me on solving this issue?

 

[cdwheel]

Can anyone please help me on solving this issue?

I managed to solve it by disabling (deleting) the iCloud account in the system preferences and then creating it again.