“Calendar Cache” couldn’t be moved because you don’t have permission to access “Calendars”.

Spidey,

Have you tried to "Repair Disk Permissions" using Disk Utility?

What are the "Sharing & Permissions:" settings for your Calendars Folder? You can find the Calendars Folder by selecting Finder>Go>Depress the "Option" key>Library>Calendars. When you get to Calendars Folder, right click on it and choose "Get Info." The Priveledge listed for (yourusername (Me)) should be "Read & Write."

Spidey,

I presume your User acccount is an Admin Account. If so, click on the lock icon on the bottom right hand corner of the "Info" window and sign in with your password.

Click on the + icon to add your username to the Privlege list, and choose "Read & Write" from the drop down menu.

Log out/in or restart and check iCal for proper function.

Spidey,

Did you click the lock after making the change?

My settings are:

(Me) Read & Write

staff Read only

everyone Read only

Two other things to try:

1. Safe Boot

2. Reinstall the Mac OS X 10.7.3 Update.

Spidey,

I have to admit defeat..perhaps someone else will try to help.

Good Luck!

I have the exact problem on another account, but not mine, the administrator. Cannot open iCal at all on that account. However, I can open ICal on a different account. Tried all the same suggestions.

I have just had the same problem with Calendar & Reminders and have fixed it by editing the Read & Write permissions on the Calendar Cache folder. This is accessed by selecting Finder>Go>Depress the "Option" key>Library>Calendars. In this folder is the Calendar Cache folder. Right click and Get Info, then check the rights are correct. If not change them to you as Read & Write and anyone else as read only.

Thanks, it worked.

Followed directions but still get the same result. What is next?

Suggest you call support