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This article describes the location of power, reset, and interrupt buttons on all modular Macintosh models.
To determine the equivalent Performa model to those Macintosh models listed below, refer to article13998: "
Macintosh to Performa Comparison Chart"
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DISCUSSION
General Information: Power Buttons
The Power button on modular Macintosh models is typically located on the back of the computer close to the right or left side (depending on the model).
Power buttons come in different shapes and sizes. Some are push buttons (round or square), which may be plain, or may include a sideways triangle or a circle with a small straight line inside. Others are toggles, which include a 1 and a 0 (1=On, 0=Off).
General Information: Reset and Interrupt Buttons
The Reset and Interrupt buttons are located in different areas on different models. Refer to model-specific descriptions below.
The reset button is marked with a small triangle as shown in Figure 1. Pushing the reset button restarts the computer.
The interrupt button is marked with a circle; if the button is large enough there is a crooked line in the circle, as shown in Figure 1. It is used by Macintosh software programmers when writing applications and debugging them.
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| Reset button icon | Interrupt button icon |
Figure 1 Reset and Interrupt button icons
Keyboard Commands
If the computer does not have a reset button, use the Command-Control-Power keys instead.
If the computer does not have an interrupt button, use the Command-Power keys instead.
Modular Macintosh Model Specifics
| Model | Power Location | Reset/Interrupt Location |
| Macintosh II, IIx, IIfx | Back panel. | Right side of the computer near the rear. You must install the buttons. |
| Macintosh IIcx, IIci | Back panel. Rotate 90 degrees to lock power on. | Front panel, lower left. |
| Macintosh IIsi, LC, LC II, LC III, LC 475, Quadra 605, Performa 400 series | Back panel. | None. Use keyboard commands. |
| Macintosh LC 550, Macintosh TV, Performa 550 and 560 | Back panel. | None. Use keyboard commands. |
| Macintosh LC and Performa 575, 577, 578, 580 | Back panel. | None. Use keyboard commands. |
| Macintosh 630 family, Performa 6200, 6300, and 6360 series | Back panel. | None. Use keyboard commands. |
| Macintosh Performa 6400 series | Back panel. | None. Use keyboard commands. |
| Macintosh IIvx, IIvi, Performa 600, Centris 650, Quadra 650 | Back panel. | Front panel, lower left. |
| Macintosh Centris/Quadra 610 | Front panel, lower right side. | Back of computer. |
| Macintosh Centris/Quadra 660AV | Front panel, lower right side. | None. Use keyboard commands. |
| Macintosh Quadra 700, 800 | Back panel. | Front panel near bottom. |
| Macintosh Quadra 840AV | Front panel, upper right. | None, use keyboard commands. |
| Macintosh Quadra 900, 950 | None, use key lock. | Front panel, near top left. |
| Power Macintosh and Performa 5200 and 5300 series | Back panel. | None, use keyboard commands. |
| Power Macintosh and Performa 6100 series | Front panel, lower right side. | Back of computer or use keyboard commands. |
| Power Macintosh 7100 series | Back of computer. | Front panel on left side or use keyboard commands. |
| Power Macintosh 7200, 7500, and 7600 series | Front panel, left side. | Use keyboard commands. |
| Power Macintosh 8100 series | Back panel. | Front panel near the bottom or use keyboard commands. |
| Power Macintosh 8500 and 9500 series | Front panel, near top. | Use keyboard commands. |
| Power Macintosh G3 |
Desktop - front panel.
Mini-tower -front panel. All-in-One - rear panel. |
Use keyboard commands. |
| Power Macintosh G3 (Blue and White) | Front panel. | Front panel or use keyboard commands. |
| Power Mac G4 | Front panel. | Front panel or use keyboard commands. |
| Power Mac G4 (Gigabit Ethernet) | Front panel. | Front panel reset button. |
| Power Mac G4 Cube | Top of computer. | Underside of computer. |
| iMac | Front panel. | Right side of computer or use keyboard commands. |