Q: i can not open numbers.

A

Please back up all data.

Quit the application, if it's running.

Triple-click anywhere in the line below on this page to select it:

~/Library/Containers/

Right-click or control-click the highlighted line and select

          Services ▹ Reveal in Finder (or just Reveal)

from the contextual menu. A Finder window should open with a folder selected. If it does, move the selected folder—not just its contents—to the Desktop.

The folder you're moving has a name that begins with "com." It is not the subfolder named "Data" or anything else.

Launch the problem application and test. If it works now, delete the folder you moved. Otherwise, quit again, and put the folder back where it was, overwriting the one that may have been created in its place.

Caution: If you delete some or all of the contents of the selected folder, but leave the folder itself in place, the application may not launch. Deleting the folder will cause it to be rebuilt automatically.

B

There is excessive swapping of data between physical memory (that is, the memory chips on the logic board) and virtual memory (one or more files on the startup volume.) That activity is relatively slow and causes the whole system to be less responsive. It can happen for two reasons:

          A long-running process with a memory leak (a kind of bug)

          Not enough memory for your usage pattern

Please note that if the cause is a memory leak, installing more memory will not help. That's likely if you already have more than 4 GB of memory. Tracking down a memory leak can be difficult, and it may come down to a process of elimination.

These instructions are for OS X 10.9 and later. Some details may be slightly different for earlier versions of OS X.

When you notice the slowdown, open the Activity Monitor application and select All Processes from the View menu, if it's not already selected. Select the Memory tab. Click the heading of the Real Mem column in the process table twice to sort the table with the highest value at the top. If you don't see that column, select

          View ▹ Columns ▹ Real Memory

from the menu bar.

If one process (excluding "kernel_task") is using much more memory than all the others, that could be an indication of a leak. A better indication would be a process that continually grabs more and more real memory over time without ever releasing it. Here is an example of how it's done.

"Wired" memory should be less than half of the total. That memory is not swapped, but it makes less physical memory available which may then result in swapping. If most of the memory is wired, that may be an indication of a memory leak in a third-party program that modifies the operating system at a low level. Ask for guidance in that case.

If you don't have an obvious memory leak, the options are to install more memory (if possible) or to run fewer programs simultaneously.