About unexpected restarts

When it starts up again, you might see a message that your computer was restarted because of a problem. Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down. Mar 04, 2016 There is no such thing as automatic removal of all possible malware, either by OS X or by third-party software. That's why you can't rely on software to protect you. If the malware is removed in your case, you'll still need to make changes to the way you use the computer to protect yourself from further attacks. Ask if you need guidance.

Rarely, your Mac might experience a software or hardware issue that requires it to restart. When it starts up again, you might see a message that your computer was restarted because of a problem.

Unexpected restarts are usually caused by software installed on your Mac, or by devices connected to your Mac. If the issue causes your Mac to restart every time it attempts to start up, your Mac might eventually shut down. Use the steps below to check the software and hardware on your Mac.

Check your software

If the issue is caused by software on your Mac, one of these steps might help:

• Install all available software updates.
• If your Mac suspects that a particular app caused the restart, it might ask whether you would like to move the app to the Trash. Click Move to Trash, then contact the software developer to see if a software update is available.
• Use safe mode to try to isolate the cause of the issue.
• Reinstall macOS. If the issue continues after reinstalling macOS, check your hardware.

Check your hardware

Learn how to check your connected devices and other hardware.

Check peripheral devices first

If you don't have any devices attached to your Mac, skip to the next section.

1. Shut down your Mac.
2. Disconnect all peripheral devices, such as hard drives or printers. If you have a desktop Mac, make sure that only a display, keyboard, and mouse or trackpad are connected.
3. Turn on your Mac.
4. Use your Mac for the amount of time that it would usually take for an unexpected restart to occur.
5. If an unexpected restart occurs, follow the steps to check the internal RAM and third-party hardware.
6. If an unexpected restart doesn't occur, turn off the Mac and connect one peripheral device at a time until an unexpected restart occurs.

Check RAM and third-party hardware

Certain models of Mac computers have removable memory (RAM). If you recently installed memory or a hard disk (or SSD), make sure that it's compatible and installed correctly. If possible, remove it and test with the original memory or disk.

Learn more

• If you continue to experience unexpected restarts, contact Apple Support.
• If your Mac is frequently restarting unexpectedly, it's important to determine the exact steps that lead up to the issue. The next time that your Mac restarts unexpectedly, record the date and time it occurs. These questions might help you diagnose the problem:
  • Was the computer starting up, shutting down, or performing a particular task when the unexpected restart happened?
  • Is the computer restart random, or does it happen every time you do a certain task?
  • Does the restart happen when a specific external device is connected to your Mac or to a specific port?
• Learn what to do if your Mac doesn't turn on or start up.
• Learn about the screens you see when your Mac starts up.

Among personal-computer enthusiasts, there are many rare and desirable models from years' past. The Apple Lisa. Steve Jobs's NeXT computer. The Canon Cat. But there's a machine selling on eBay right now that's arguably the rarest of them all: a prototype of the original Apple Macintosh computer.

As you might imagine for such a once-in-a-lifetime find, the prototype Mac 128k is commanding a hefty sum: The starting bid is $99,995. The auction only has hours left, but at least one person has made a bid for the super-rare machine.

The seller, a longtime Mac enthusiast, told Mashable he found the machine in January via AppleFritter, a site dedicated to vintage Apple products. He bought the Mac from a person near Boston and says he paid a 'significant amount of money' for it.

Random Computer Prototype Mac Os Catalina

'He was not advertising it for sale,' says Adam, who did not want to reveal his last name. 'I threw him a message asking if he was interested in selling it. He had originally bought it for $500.'

Once Adam got the machine, he worked furiously to get it working again. But there was a challenge: Apple designed the prototype to work with its proprietary disk format, Twiggy. Twiggy disks, with resemble old 5.25-inch floppy disks, were used with the Apple Lisa. However, the drives had a notoriously high failure rate, and Apple switched to Sony 3.25-inch disks for the production run of the Macintosh.

Random Computer Prototype Mac Os 8

Even though Adam had working Twiggy disks for his Lisa machines, they couldn't coax his prize Mac to boot up. He suspects Apple made the prototype this way by design, so it wouldn't work for anyone else.

'It might be a specific pre-release version of the Mac OS that will only boot this machine,' says Adam. 'If anyone [has it], it would be one of the original Macintosh team back from 1983. Since this machine left Apple, it's never booted up.'

Since Adam can't get it to work, the Mac is now open to anyone on eBay who has $100,000 to spare. Adam hopes whoever the new owner is can give it a home such an iconic machine deserves.

'Because it's the only one,' Adam says. 'I don't feel that I am the right person to own it, due to its historical significance. It's very likely to be the world's oldest Mac. In my heart, and in my gut, it should belong in a Smithsonian or a museum.

'But I paid a lot of money for this computer. I'm not a rich person. I hope it'll sell and make my money back and make a decent profit to make it worth my while.'

Where would you like to see the prototype Mac end up? And how much would you pay for it? Share your thoughts in the comments.