How can I learn about repairing Apple devices or Mac computers?

I have been a long time Mac user so I am pretty familiar with Mac OS. But I know almost nothing about how my computer actually works. I sometimes think I would like to learn about the inner workings of my computer and maybe buy an old Mac and get it back into working condition. I saw a Youtube video of a guy who found an old G4 iMac (I had one) in the trash and he took it home, took it apart, cleaned it, repaired and upgraded it, and was able to install a much more recent version of MacOS on it and now he is using it as a regular computer. Can anyone recommend, perhaps, a book, like "repairing Mac computers for beginners" or anything like that? I have not seen one on Amazon. Is there an online course? A Youtube channel? A website?


I remember the older Macs used to actually have a little door on the back or bottom and you could easily buy more RAM and upgrade your computer by opening the door and changing the RAM. I know in the last 15 years they have moved more towards having the whole system on one chip so the computers are not as easily worked on or upgraded as they once were. But I have seen companies like that sells parts and even have videos about upgrading and repairing relatively modern Macs. So it must be possible. Any suggestions would be greatly appreciated.




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iMac (M4)

Posted on May 26, 2025 12:49 PM

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16 replies

May 26, 2025 1:39 PM in response to Emmett_1944

There are countless Youtube videos available and also sites such as iFixit.com has resources. You can also use:


https://eshop.macsales.com/installvideos too.


However to properly learn how to repair Macs you may want to consider working at an Apple Authorized Service Provider where you can get proper training and knowledge. What you described above was very likely some hacker that just hacked away and installed an illegal version of Mac OS on an obsolete device. Those are subjects that will not be discussed on these forums as they violate the Terms of Use we all agree to. You can look over the Terms of Use for these forums by clicking the link at the bottom of this webpage.

May 26, 2025 3:06 PM in response to Emmett_1944

I’d say YouTube is an overall great resource. No one particular channel, but search specifically for which Apple model and part you are looking to repair/replace and see what videos pop up.


But for sure the computers of the 90’s and early 2000s were the best for tinkering at home. Modern computers with their systems-on-chips, smaller enclosures with little to no accessibility for the average user at home, all offer little to no ability to repair/replace at home. Although I am curious where the “right to repair” bill/law stands right now? I heard a couple years ago that Apple was going to make it easier and provide more resources for at home repairs.

May 29, 2025 9:44 PM in response to Emmett_1944

Emmett_1944 wrote:

Why is it if I search Amazon for "how to build a computer" I get a long list of books? But for Apple there is none. Does Windows not care who uses Windows?


Apple has always controlled the Mac operating system, and these days, they control the microprocessors Macs use, as well. There was a brief period when Apple allowed cloning. But only a brief period.


When IBM came out with the IBM PC, they could have built their own microprocessor, and written their own OS. Had they done so, and kept those things to themselves, they would still own the PC market today. But IBM was apparently unconcerned with the possibility of cloning. They bought off-the-shelf microprocessors from Intel – and made a deal with Microsoft that let Microsoft sell MS-DOS to other vendors. Few 8-bit personal computers could run each other's software without modification – even if you were talking about a program that was written in BASIC, and the machines in question were all running variants of Microsoft BASIC. So maybe IBM thought the market for computers (other than IBM PCs) that ran MS-DOS would be equally fragmented.


As it turned out, the PC was easily cloned. Once someone figured out how to clone the BIOS, just about all the other parts could be bought off-the-shelf from vendors who were eager to sell their components to any and all box builders.


Intel, AMD, and Microsoft made out like bandits. They got paid no matter whose box you bought. Box builders such as IBM, Compaq, Gateway 2000, Packard Bell got to beat each other's brains out.


IBM tried to regain control of the PC market with the Microchannel bus and the OS/2 operating system at some point, but it didn't take. Eventually, IBM gave up on their PC business, selling the business to Lenovo because it was not profitable enough.

May 29, 2025 10:22 PM in response to M5Marco

M5Marco wrote:

I heard a couple years ago that Apple was going to make it easier and provide more resources for at home repairs.


Apple has a Self Service Repair program "intended for individuals with the knowledge and experience to repair electronic devices." That would not include most home users.


Self Service Repair - Apple Support


Out of curiosity, I downloaded the repair manual for my iPhone 12 mini. After looking through that, and seeing all of what is involved in servicing such a miniaturized device, I would be in no hurry to repair mine. But I like having the manual. (I also have a Haynes "service manual" for the Klingon Bird of Prey. If the Klingons actually existed, and had me work on their warp engines, they would soon discover that "Today is a good day to die!")

May 29, 2025 6:55 PM in response to rkaufmann87

Thanks for that info. That ifixit looks like good information. I don't know if I could work at an Apple Authorized Service Provider as I am doing this just for fun and out of curiosity, not as a career. Maybe if they are in bad need of people I could come in a few hours a week to help out. It would certainly be a learning experience.


Why is it if I search Amazon for "how to build a computer" I get a long list of books? But for Apple there is none. Does Windows not care who uses Windows?

May 30, 2025 5:16 PM in response to rkaufmann87

rkaufmann87 wrote:

Not sure what that last sentence means, " Does Windows not care who uses Windows?"

I guess since when I search amazon for books on repairing or building an apple computer I find none. If I search for repairing or building a Windows computer there are many choices. So I assume whoever is making Windows doesn't care what computer you put it on.


If you want to learn how to build a computer, I'd recommend that you build yourself a MS Windows machine as you cannot build your own Mac.

You may be right. The thing is I have been a very long time Apple user and would like to learn how apple computers work. My experience with windows was terrible.


May 30, 2025 5:53 PM in response to Servant of Cats

Thanks for that info. I googled around and here is what I found. Apple cannot stop you from building from scratch your own computer that can run MacOS. This made sense to me. The problem arises when you go to install MacOS, you have to agree to an End User License Agreement which says you will only install Mac OS on official Apple devices. So installing MacOS on a computer you made from scratch would be a violation of the agreement. I guess that explains why there are no books on how to build an Apple computer.


As far as vintage equipment, as long as it is officially Apple you can modify and upgrade it and install the latest MacOS it will take.


None of this applies to me. I am just ruminating. If I even knew how to disassemble an apple computer I wouldn't know what I was looking at. Still, I'd be interested to know what is in there and how it works.

May 30, 2025 6:35 PM in response to Emmett_1944

Emmett_1944 wrote:

The thing is I have been a very long time Apple user and would like to learn how apple computers work. My experience with windows was terrible.


There is a lot more to learning how a computer works than just learning how to bolt together a motherboard, CPU, graphics card, drive, power supply, case, operating system, and applications pre-assembled for you by somebody else.


Most of the interesting stuff has to do with basic operating principles, or with design. Ultimately this can involve a lot of areas, including

  • Mathematics
  • Computer Science
  • Software Engineering
  • Human Interface Design
  • Electrical Engineering
  • Physics and Material Engineering
  • Artificial Intelligence

May 30, 2025 7:02 PM in response to Emmett_1944

Emmett_1944 wrote:

Still, I'd be interested to know what is in there and how it works.


If you are interested in learning how to program for Macs, there is the Swift Playground app. There's also Xcode – though that's more of a full-blown development environment for people who already have development skills.


Swift Playground - Apple Developer

Xcode - Apple Developer


Here's one place to find documentation on the services that macOS provides to applications.


Apple Developer

May 31, 2025 8:47 AM in response to Emmett_1944

Emmett_1944 wrote:

No doubt you are right. I guess it makes no sense to build a PC. For the same price I can get a decent iPad.


If you want a PC, get a PC.


If you want to order a "white-box" PC from a vendor who will let you exercise a lot of control over parts selection, do that. For example, Puget Systems is a fairly well known high-end box builder. Expect to pay not just for parts, but for their expertise. There are other "white box" builders whose prices may be lower – maybe even "brick and mortar" ones in your own community. Once upon a time the clone market supported so many vendors that there was an advertising magazine called "Computer Shopper" whose monthly issues were the size of several large city phone books. Those days are long gone, but some "white box" cloners live on.


If you want to put together a Wintel PC from parts, instead of buying a preassembled one or going to a "white box" vendor, like almost everyone else, then do so. Note that if you do this, and something goes wrong, you may enjoy the fun experience of all of the component vendors pointing fingers at each other, while you are the one who is on the hook to figure out where the conflicts and/or defects actually lie. If you are expecting to get away with paying a lot less money for components than you would for a pre-assembled PC (that has the same components), you'll probably be sadly disappointed.


You may learn something about building a desktop PC from pre-assembled parts, and about troubleshooting one. Just don't confuse this with broader and deeper knowledge about how computers work.

May 31, 2025 7:02 PM in response to Servant of Cats

Servant of Cats wrote:


Emmett_1944 wrote:

No doubt you are right. I guess it makes no sense to build a PC. For the same price I can get a decent iPad.

If you want a PC, get a PC.


Once upon a time the clone market supported so many vendors that there was an advertising magazine called "Computer Shopper" whose monthly issues were the size of several large city phone books. Those days are long gone, but some "white box" cloners live on.

Yup. There was also Computers And Electronics, Byte Magazine, and before that Popular Electronics. Mint copies of Computer Shopper are now selling on eBay for $30-$40.

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