Frozen program? How to close it and get back to work

A program stops responding. The cursor spins, your clicks do nothing, and you wonder whether your work is still there.

Start by giving the program a chance to finish. If it stays unresponsive, you can force quit it: tell your computer to close the program when it will not close normally.

Force quitting can lose unsaved changes in that program, including work in its other open documents. Try a normal save and close first, if the program will respond.

Quick steps

If you have already waited and tried closing the program normally:

Press all three keys together. These shortcuts open a tool so you can choose which program to close. Windows instructions · Mac instructions

Before you force quit: is it frozen or just busy?

Design software can take time to open a large model, render an image, import geometry, or export a drawing. A spinning cursor or a temporary “Not responding” message does not, by itself, prove that the program has failed.

• If you just started a demanding operation, give it time. Watch for a changing progress indicator. A large render or export may need several minutes or longer.
• Stop repeatedly clicking or restarting the command. Give the program a chance to respond.
• Check for a dialog waiting for your answer. A save prompt, warning, or other window may be hidden behind the main window.
• Try switching to another program. If other programs work, you may be able to close just the frozen one and keep the rest of your work open.

There is no universal waiting time. Consider what the program was doing, whether it is making progress, and how much unsaved work is at stake.

Windows: use Task Manager

Task Manager shows the programs and background processes running on your computer. It also shows how much processing power and memory they are using.

1. Press Ctrl + Shift + Esc. You can also right-click the Start button and choose Task Manager.
2. Open Processes if it is not already selected.
3. Find the frozen program by name, such as Rhino, Photoshop, or Illustrator.
4. Select that program and choose End task.
5. Wait for its window to disappear, then reopen the program.

The layout may vary slightly between Windows versions. Microsoft documents both ways to open Task Manager and the Processes and End task controls.

Choose only the program you recognize and intend to close. Leave unfamiliar background processes and Windows processes alone. You do not need to end everything in the list.

High CPU or memory use can help explain a slowdown, but it is not automatically a problem. A program that is rendering may be working hard exactly as expected.

Mac: use Force Quit

First, try quitting normally with Command (⌘) + Q or Quit in the program’s menu. If it will not respond:

1. Press Option (⌥) + Command (⌘) + Esc. You can also open the Apple menu  and choose Force Quit.
2. Select the frozen program in the list.
3. Click Force Quit and confirm if prompted.
4. Wait for it to close, then reopen it.

If Finder is the frozen application, select it and choose Relaunch. See Apple’s force-quit instructions.

After reopening: check your work

Some programs offer an autosaved or recovered version after an unexpected closure. Recovery options vary, and the most recent changes may not have been saved.

1. Read any recovery prompt carefully. Do not dismiss it automatically.
2. Open and inspect the recovered document. Check the most recent work you remember doing.
3. Save a separate copy if you are unsure. Give it a clear name, such as Studio-Model-Recovered, so you can compare it with the original before replacing anything.
4. Save before retrying the operation that caused the freeze.

A document reopening successfully does not necessarily mean every change was recovered.

What if force quit does not work?

If the computer still responds, save your work in other programs and try a normal restart:

• Windows: Open Start → Power → Restart.
• Mac: Open Apple menu  → Restart. Apple recommends restarting if an app cannot be forced to quit.

If the entire computer is unresponsive and a normal restart is unavailable, a forced shutdown may be necessary. This can lose unsaved work across all open programs. The procedure depends on your computer, so follow its manufacturer’s instructions or ask for help.

If the same program keeps freezing

Force quitting gets you out of the immediate problem. Repeated freezes deserve a closer look.

Before asking for help, note:

• The program name and whether you are using Windows or Mac.
• What you were doing just before it froze, such as opening a file, rendering, or exporting a PDF.
• Whether it happens with one particular file or several files.
• Any error message. A screenshot is helpful.
• What you have already tried and whether any work is missing.

“Rhino freezes every time I export this model as a PDF” gives someone a much better starting point than “my computer doesn’t work.”

For College of Design guidance and support information, visit the CoD Wiki.