Press the power button and wait for the startup sequence
To turn on an Apple desktop computer, locate the power button on the back or side of the machine, depending on your model. On iMac computers, the power button is usually on the back lower right. On Mac mini or Mac Studio models, it's on the back. Press and hold the button for a moment—you don't need to hold it for long, just a firm press. The computer will begin its startup sequence when ready.
You'll see the Apple logo appear on the screen within a few seconds, followed by a progress bar. This is normal. The startup process typically takes between 30 seconds and two minutes, depending on how much software your computer has and how long it's been since the last restart. During this time, the computer is loading the operating system and preparing all its systems to run.
If nothing happens after you press the power button, check that the power cable is firmly connected to both the computer and the wall outlet. If the cable is loose, reconnect it and try again. Some Apple desktops also have a power switch on the power cable itself—make sure that switch is in the on position.
Key Takeaways
- The power button on Apple desktops is located on the back of the machine, and a single press will start the startup sequence.
- The Apple logo and progress bar appear within seconds, and full startup usually takes 30 seconds to two minutes.
- If the computer doesn't respond, check that the power cable is connected firmly to both the computer and the wall outlet.
- Some power cables have an on/off switch that must be in the on position before the computer will start.
- Once you see the login screen, you can enter your password to access your account and begin using the computer.
What to do when you see the login screen
After the startup sequence completes, your Apple desktop will display the login screen. This screen shows one or more user accounts. Click on your account name or icon, then type your password in the box that appears. If you share the computer with other people, each person has their own account, and you'll only see your own files and settings after you log in.
If you forget your password, you can use your Apple ID to reset it. Click the question mark icon next to the password field, and the computer will walk you through the reset process. You'll need access to the email address or phone number associated with your Apple ID.
Restarting instead of powering off completely
If your Apple desktop is already on but not responding properly, you can restart it without fully powering it down. Click the Apple menu in the top left corner of the screen, then select "Restart." The computer will close all open programs (you may be asked to save your work first), shut down, and turn back on automatically. This usually fixes minor software problems.
A restart is different from putting the computer to sleep. Sleep mode keeps the computer powered but uses very little electricity, and it wakes up when ready when you move the mouse or press a key. To put your computer to sleep, go to the Apple menu and select "Sleep." To wake it, just move the mouse or press any key.
When the computer won't turn on
If you've pressed the power button and nothing happens after several minutes, the computer may not be receiving power. Check the power cable connection at both ends—the wall outlet and the back of the computer. Try plugging the power cable into a different outlet to rule out a problem with that particular outlet. If you have a power strip, make sure it's turned on.
If the computer still doesn't respond, wait a few minutes and try again. Sometimes a computer needs time to recover if it was shut down unexpectedly. If it remains unresponsive after multiple attempts over several hours, the power supply inside the computer may have failed. At that point, contact Apple Support or take the computer to an Apple Store for diagnosis.
Understanding the startup sounds and lights
When you press the power button, you may hear a startup sound—a chime or tone that plays as the computer begins. This is normal and indicates the computer is receiving power and beginning its startup sequence. Some newer Apple desktops have a subtle LED light that illuminates when power is on.
If you hear a beeping sound instead of the normal startup sound, or if the computer makes repeated beeping noises, this can indicate a hardware problem. In that case, turn off the computer by holding the power button for 10 seconds, then contact Apple Support for guidance.
Turning on the display separately
If your Apple desktop uses an external monitor (a separate screen), you may need to turn on the monitor as well. Most external monitors have their own power button, usually on the front or bottom of the screen. Turn on the monitor after the computer has started, or turn them on at the same time. The monitor will display the startup sequence and login screen once the computer is ready.
If you turn on the computer but the monitor remains blank, check that the cable connecting the monitor to the computer is firmly seated at both ends. Also verify that the monitor's power cable is connected and the monitor itself is powered on. If the monitor still shows no image after checking these connections, the monitor may need troubleshooting separate from the computer itself.
Frequently Asked Questions
How long should I wait before assuming the computer won't turn on?
Wait at least three to five minutes after pressing the power button. The first startup after a long period of being off can take longer than usual. If you still see nothing after five minutes, check the power connections and try again.
Is it bad to turn off my Apple desktop by holding the power button?
Holding the power button for 10 seconds forces the computer to shut down when ready without saving open work. This can damage files or the operating system if done repeatedly. Use it only when the computer is completely unresponsive. For normal shutdown, use the Apple menu and select "Shut Down."
Why does my computer take longer to start up some days than others?
Startup time varies based on how much software is running in the background, recent updates to the operating system, and how full your hard drive is. If startup times are getting longer over time, restarting the computer regularly and removing unused programs can help.
Can I turn on my Apple desktop remotely?
Most Apple desktops cannot be turned on remotely if they are completely powered off. However, if the computer is in sleep mode, you can wake it remotely using another Apple device if you've set up remote access. Once the computer is on, you can control it from another device using Apple Remote Desktop or similar tools.