Used apple all in one computers

Question: Q: I bought a used all in one Apple computer but it doesn’t seem to have an operating system. How can I get the latest version on the computer

I bought a used all in one Apple computer but it doesn’t seem to have an operating system. How can I get the latest version on the computer.

Posted on Jul 11, 2021 1:46 AM

What are you calling an all in one?

PowerMac All in One

iMac G5, and when there is mini-DVI in back instead mini-VGA it is an early iMac Intel

The iMac Intels without the optical drives on the right hand side can run the command-option-shift-R system restore.

Some of the ones with the optical drive could as well, some you have to find the original discs or a retail copy of 10.6.

The EMC# on the foot of the machine is a clue of the age of the machine and can tell us what is required.

Posted on Aug 1, 2021 5:12 PM

Helpful answers

You do not tell us what happens when you try to startup the computer. I would have to wonder why you would buy a non functioning computer in the first place. Did the seller inform you about anything they might have done to cause this problem? Here is what I suggest you do. First you should understand that any older Mac can only accept certain operating systems. Which ones will depend on the year and model of the Mac. Normally the serial number can b found on the bottom of the computer. With that information, you can go online to the Apple web site and be told the year and model. They will also have the information as to which OS may be installed in that model. (You will have to hunt around for this information, though.) Now, try starting up the computer in the Internet Recovery Mode. Press the Command + Option + R keys at startup. If it starts up. You can then download and install the original version of the operating system that computer came with. After that is done, you may then upgrade (not update) the OS to the latest OS that that model will accept. Just so you know, an OS download may typically take up to an hour, more or less and the installation may take another 45 minutes, more or less, with several automatic restarts. I strongly recommend that you do not use Wi-Fi to do these downloads. it is too slow for these very large files and corruption often happens. Better to use a wired Ethernet connection. Good luck.

Jul 11, 2021 10:42 AM

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You do not tell us what happens when you try to startup the computer. I would have to wonder why you would buy a non functioning computer in the first place. Did the seller inform you about anything they might have done to cause this problem? Here is what I suggest you do. First you should understand that any older Mac can only accept certain operating systems. Which ones will depend on the year and model of the Mac. Normally the serial number can b found on the bottom of the computer. With that information, you can go online to the Apple web site and be told the year and model. They will also have the information as to which OS may be installed in that model. (You will have to hunt around for this information, though.) Now, try starting up the computer in the Internet Recovery Mode. Press the Command + Option + R keys at startup. If it starts up. You can then download and install the original version of the operating system that computer came with. After that is done, you may then upgrade (not update) the OS to the latest OS that that model will accept. Just so you know, an OS download may typically take up to an hour, more or less and the installation may take another 45 minutes, more or less, with several automatic restarts. I strongly recommend that you do not use Wi-Fi to do these downloads. it is too slow for these very large files and corruption often happens. Better to use a wired Ethernet connection. Good luck.

Jul 11, 2021 10:42 AM

What are you calling an all in one?

PowerMac All in One

iMac G5, and when there is mini-DVI in back instead mini-VGA it is an early iMac Intel

The iMac Intels without the optical drives on the right hand side can run the command-option-shift-R system restore.

Some of the ones with the optical drive could as well, some you have to find the original discs or a retail copy of 10.6.

The EMC# on the foot of the machine is a clue of the age of the machine and can tell us what is required.

Aug 1, 2021 5:12 PM

Question: Q: I bought a used all in one Apple computer but it doesn’t seem to have an operating system. How can I get the latest version on the computer More Less

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Used apple all in one computers

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What to do before you sell, give away, or trade in your Mac

To prepare your Mac for a new owner, use these steps restore it to factory settings.

Should you use these steps?

If you’ve upgraded to macOS Monterey on a Mac with Apple silicon or a Mac with the Apple T2 Security Chip, follow the steps to erase all content and settings instead of the steps in this article.

For any other Mac or macOS, follow the steps below.

Back up or transfer your files

Use an external storage device to back up your files, or use Migration Assistant to move your files to your new Mac.

Sign out of iTunes

If using macOS Catalina or later, you can skip this step.

Open iTunes. From the menu bar at the top of the screen or iTunes window, choose Account > Authorizations > Deauthorize This Computer. Then enter your Apple ID and password and click Deauthorize. Learn more about deauthorizing.

Sign out of iCloud

If using macOS Catalina or later, choose Apple menu  > System Preferences, then click Apple ID. Select Overview in the sidebar, then click Sign Out.

If using an earlier version of macOS, choose Apple menu  > System Preferences, click iCloud, then click Sign Out.

You will be asked whether to keep a copy of your iCloud data on this Mac. You can keep a copy, because you’re erasing your Mac later. Your iCloud data remains in iCloud and on any other devices that are signed in to iCloud with your Apple ID.

Sign out of iMessage

Open the Messages app, then choose Messages > Preferences from the menu bar. Click iMessage, then click Sign Out.

Reset NVRAM

If using a Mac with Apple silicon, you can skip this step.

Shut down your Mac, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. Release the keys after about 20 seconds. This clears user settings from memory and restores certain security features that might have been altered. Learn more about resetting NVRAM .

Optional: Unpair Bluetooth devices that you’re keeping

If your Mac is paired with a Bluetooth keyboard, mouse, trackpad, or other device that you plan to keep, you can unpair it. This optional step prevents accidental input when the Mac and device have separate owners but remain in Bluetooth range. If you do this on a Mac that doesn’t have a built-in keyboard or trackpad, you will need to plug in a USB keyboard and mouse to complete the remaining steps.

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Erase your Mac and reinstall macOS

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Identify your MacBook Pro model

Use this information to find out which MacBook Pro you have, and where it fits in the history of MacBook Pro.

Your Mac provides several tools to help you identify it. The simplest is About This Mac, available by choosing About This Mac from the Apple menu  in the upper-left corner of your screen. The other is the System Information app. Learn how to use these tools to identify your Mac.

If you don’t have your Mac or it doesn’t start up, use one of these solutions instead:

• Find the serial number printed on the underside of your Mac, near the regulatory markings. It’s also on the original packaging, next to a barcode label. You can then enter that serial number on the Check Coverage page to find your model.
• The original packaging might also show an Apple part number, such as MLH12xx/A (“xx” is a variable that differs by country or region). You can match the Apple part number to one in the list below to find your model.

List of MacBook Pro models

MacBook Pro models are organized by the year they were introduced, starting with the most recent. Click the model name for detailed technical specifications.

MacBook Pro models from 2015 and newer can run the latest version of macOS. For older models, the latest compatible operating system is noted.

MacBook Pro (14-inch, 2021)
Colors: Silver, space gray
Model Identifier: MacBookPro18,3, MacBookPro18,4
Part Numbers: MKGP3xx/A, MKGQ3xx/A, MKGR3xx/A, MKGT3xx/A
Tech Specs: MacBook Pro (14-inch, 2021)
User Guide: MacBook Pro (14-inch, 2021)

MacBook Pro (16-inch, 2021)
Colors: Silver, space gray
Model Identifier: MacBookPro18,1, MacBookPro18,2
Part Numbers: MK183xx/A, MK193xx/A, MK1A3xx/A, MK1E3xx/A, MK1F3xx/A, MK1H3xx/A
Tech Specs: MacBook Pro (16-inch, 2021)
User Guide: MacBook Pro (16-inch, 2021)

MacBook Pro (13-inch, M1, 2020)
Colors: Silver, space gray
Model Identifier: MacBookPro17,1
Part Numbers: MYD83xx/A, MYD92xx/A, MYDA2xx/A, MYDC2xx/A
Tech Specs: MacBook Pro (13-inch, M1, 2020)
User Guide: MacBook Pro (13-inch, M1, 2020)

MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro16,3
Part Numbers: MXK32xx/A, MXK52xx/A, MXK62xx/A, MXK72xx/A
Tech Specs: MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2020, Two Thunderbolt 3 ports)

MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro16,2
Part Numbers: MWP42xx/A, MWP52xx/A, MWP62xx/A, MWP72xx/A, MWP82xx/A
Tech Specs: MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2020, Four Thunderbolt 3 ports)

MacBook Pro (16-inch, 2019)
Colors: Silver, space gray
Model Identifier: MacBookPro16,1, MacBookPro16,4
Part Numbers: MVVJ2xx/A, MVVK2xx/A, MVVL2xx/A, MVVM2xx/A
Tech Specs: MacBook Pro (16-inch, 2019)
User guide: MacBook Pro (16-inch, 2019)

MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,4
Part Numbers: MUHN2xx/A, MUHP2xx/a, MUHQ2xx/A, MUHR2xx/A, MUHR2xx/B
Tech Specs: MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2019, Two Thunderbolt 3 ports)

MacBook Pro (15-inch, 2019)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1, MacBookPro15,3
Part Numbers: MV902xx/A, MV912xx/A, MV922xx/A, MV932xx/A, MV942xx/A, MV952xx/A
Tech Specs: MacBook Pro (15-inch, 2019)
User Guide: MacBook Pro (15-inch, 2019)

MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MV962xx/A, MV972xx/A, MV982xx/A, MV992xx/A, MV9A2xx/A
Tech Specs: MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2019, Four Thunderbolt 3 ports)

MacBook Pro (15-inch, 2018)
Colors: Silver, space gray
Model Identifier: MacBookPro15,1
Part Numbers: MR932xx/A, MR942xx/A, MR952xx/A, MR962xx/A, MR972xx/A, MUQH2xx/A
Tech Specs: MacBook Pro (15-inch, 2018)
User Guide: MacBook Pro (15-inch, 2018)

MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro15,2
Part Numbers: MR9Q2xx/A, MR9R2xx/A, MR9T2xx/A, MR9U2xx/A, MR9V2xx/A
Tech Specs: MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2018, Four Thunderbolt 3 ports)

MacBook Pro (15-inch, 2017)
Colors: Silver, space gray
Model Identifier: MacBookPro14,3
Part Numbers: MPTR2xx/A, MPTT2xx/A, MPTU2xx/A, MPTV2xx/A, MPTW2xx/A, MPTX2xx/A
Tech Specs: MacBook Pro (15-inch, 2017)
User Guide: MacBook Pro (15-inch, 2017)

MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,2
Part Numbers: MPXV2xx/A, MPXW2xx/A, MPXX2xx/A, MPXY2xx/A, MQ002xx/A, MQ012xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2017, Four Thunderbolt 3 ports)

MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro14,1
Part Numbers: MPXQ2xx/A, MPXR2xx/A, MPXT2xx/A, MPXU2xx/A
Tech Specs: MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)

MacBook Pro (15-inch, 2016)
Colors: Silver, space gray
Model Identifier: MacBookPro13,3
Part Numbers: MLH32xx/A, MLH42xx/A, MLH52xx/A, MLW72xx/A, MLW82xx/A, MLW92xx/A
Tech Specs: MacBook Pro (15-inch, 2016)
User Guide: MacBook Pro (15-inch, 2016)

MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,2
Part Numbers: MLH12xx/A, MLVP2xx/A, MNQF2xx/A, MNQG2xx/A, MPDK2xx/A, MPDL2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2016, Four Thunderbolt 3 ports)

MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
Colors: Silver, space gray
Model Identifier: MacBookPro13,1
Part Numbers: MLL42xx/A, MLUQ2xx/A
Tech Specs: MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)
User Guide: MacBook Pro (13-inch, 2016, Two Thunderbolt 3 ports)

MacBook Pro (Retina, 15-inch, Mid 2015)
Model Identifier: MacBookPro11,4, MacBookPro11,5
Part Number: MJLQ2xx/A, MJLT2xx/A, MJLU2xx/A
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2015)
User Guide: MacBook Pro (Retina, 15-inch, Mid 2015)

MacBook Pro (Retina, 13-inch, Early 2015)
Model Identifier: MacBookPro12,1
Part Numbers: MF839xx/A, MF840xx/A, MF841xx/A, MF843xx/A
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2015)
User Guide: MacBook Pro (Retina, 13-inch, Early 2015)

MacBook Pro (Retina, 15-inch, Mid 2014)
Model Identifier: MacBookPro11,2, MacBookPro11,3
Part Number: MGXC2xx/A, MGXA2xx/A
Newest compatible operating system: macOS Big Sur 11.6
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2014)
User Guide: MacBook Pro (Retina, 15-inch, Mid 2014)

MacBook Pro (Retina, 13-inch, Mid 2014)
Model Identifier: MacBookPro11,1
Part Numbers: MGX72xx/A, MGX82xx/A, MGX92xx/A
Newest compatible operating system: macOS Big Sur 11.6
Tech Specs: MacBook Pro (Retina, 13-inch, Mid 2014)
User Guide: MacBook Pro (Retina, 13-inch, Mid 2014)

MacBook Pro (Retina, 15-inch, Late 2013)
Model Identifier: MacBookPro11,2, MacBookPro11,3
Part Number: ME293xx/A, ME294xx/A
Newest compatible operating system: macOS Big Sur 11.6
Tech Specs: MacBook Pro (Retina, 15-inch, Late 2013)
User Guide: MacBook Pro (Retina, 15-inch, Late 2013)

MacBook Pro (Retina, 13-inch, Late 2013)
Model Identifier: MacBookPro11,1
Part Numbers: ME864xx/A, ME865xx/A, ME866xx/A
Newest compatible operating system: macOS Big Sur 11.6
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2013)
User Guide: MacBook Pro (Retina, 13-inch, Late 2013)

MacBook Pro (Retina, 15-inch, Early 2013)
Model Identifier: MacBookPro10,1
Part Numbers: ME664xx/A, ME665xx/A
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (Retina, 15-inch, Early 2013)
User Guide: MacBook Pro (Retina, 15-inch, Early 2013)

MacBook Pro (Retina, 13-inch, Early 2013)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, ME662xx/A
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (Retina, 13-inch, Early 2013)
User Guide: MacBook Pro (Retina, 13-inch, Early 2013)

MacBook Pro (Retina, 13-inch, Late 2012)
Model Identifier: MacBookPro10,2
Part Numbers: MD212xx/A, MD213xx/A
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (Retina, 13-inch, Late 2012)
User Guide: MacBook Pro (Retina, 13-inch, Late 2012)

MacBook Pro (Retina, 15-inch, Mid 2012)
Model Identifier: MacBookPro10,1
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (Retina, 15-inch, Mid 2012)
User Guide: MacBook Pro (Retina, 15-inch, Mid 2012)

MacBook Pro (15-inch, Mid 2012)
Model Identifier: MacBookPro9,1
Part Numbers: MD103xx/A, MD104xx/A
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (15-inch, Mid 2012)
User Guide: MacBook Pro (15-inch, Mid 2012)

MacBook Pro (13-inch, Mid 2012)
Model Identifier: MacBookPro9,2
Part Numbers: MD101xx/A, MD102xx/A
Newest compatible operating system: macOS Catalina 10.15.7
Tech Specs: MacBook Pro (13-inch, Mid 2012)
User Guide: MacBook Pro (13-inch, Mid 2012)

MacBook Pro (17-inch, Late 2011)
Model Identifier: MacBookPro8,3
Part Number: MD311xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Late 2011)

MacBook Pro (15-inch, Late 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MD322xx/A, MD318xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Late 2011)
User Guide: MacBook Pro (15-inch, Late 2011)

MacBook Pro (13-inch, Late 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MD314xx/A, MD313xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Late 2011)
User Guide: MacBook Pro (13-inch, Late 2011)

MacBook Pro (17-inch, Early 2011)
Model Identifier: MacBookPro8,3
Part Number: MC725xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Early 2011)

MacBook Pro (15-inch, Early 2011)
Model Identifier: MacBookPro8,2
Part Numbers: MC723xx/A, MC721xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Early 2011)
User Guide: MacBook Pro (15-inch, Early 2011)

MacBook Pro (13-inch, Early 2011)
Model Identifier: MacBookPro8,1
Part Numbers: MC724xx/A, MC700xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Early 2011)
User Guide: MacBook Pro (13-inch, Early 2011)

MacBook Pro (17-inch, Mid 2010)
Model Identifier: MacBookPro6,1
Part Number: MC024xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (17-inch, Mid 2010)

MacBook Pro (15-inch, Mid 2010)
Model Identifier: MacBookPro6,2
Part Numbers: MC373xx/A, MC372xx/A, MC371xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (15-inch, Mid 2010)

MacBook Pro (13-inch, Mid 2010)
Model Identifier: MacBookPro7,1
Part Numbers: MC375xx/A, MC374xx/A
Newest compatible operating system: macOS High Sierra 10.13.6
Tech Specs: MacBook Pro (13-inch, Mid 2010)

MacBook Pro (17-inch, Mid 2009)
Model Identifier: MacBookPro5,2
Part Number: MC226xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Mid 2009)
User Guide: MacBook Pro (17-inch, Mid 2009)

MacBook Pro (15-inch, Mid 2009)
Model Identifier: MacBookPro5,3
Part Numbers: MB985xx/A, MB986xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Mid 2009)
User Guide: MacBook Pro (15-inch, Mid 2009)

MacBook Pro (15-inch, 2.53GHz, Mid 2009)
Model Identifier: MacBookPro5,3
Part Number: MC118xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, 2.53GHz, Mid 2009)
User Guide: MacBook Pro (15-inch, 2.53GHz, Mid 2009)

MacBook Pro (13-inch, Mid 2009)
Model Identifier: MacBookPro5,5
Part Numbers: MB991xx/A, MB990xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (13-inch, Mid 2009)
User Guide: MacBook Pro (13-inch, Mid 2009)

MacBook Pro (17-inch, Early 2009)
Model Identifier: MacBookPro5,2
Part Number: MB604xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2009)
User Guide: MacBook Pro (17-inch, Early 2009)

MacBook Pro (15-inch, Late 2008)
Model Identifier: MacBookPro5,1
Part Number: MB470xx/A, MB471xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Late 2008)
User Guide: MacBook Pro (15-inch, Late 2008)

MacBook Pro (17-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB166xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (17-inch, Early 2008)
User Guide: MacBook Pro (17-inch, Early 2008)

MacBook Pro (15-inch, Early 2008)
Model Identifier: MacBookPro4,1
Part Number: MB133xx/A, MB134xx/A
Newest compatible operating system: OS X El Capitan 10.11.6
Tech Specs: MacBook Pro (15-inch, Early 2008)
User Guide: MacBook Pro (15-inch, Early 2008)

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