When you move a database from other server and tried to update it, it might generate an error saying: Table tbl is read only
The very likely case for this is mysql is not able to access the tables due to ownership.
Here is a workaround for it:
1. Go to Terminal – Application->Accessories->Terminal
2. Change the the ownership to mysql using this command
sudo chown mysql:mysql -R /var/lib/mysql/your_db_name
This command will change the owner (chown) of the db to mysql