iFixit - Answers With Device "Mac mini Late 2018"

Mac mini Late 2018: Looking to identify component(s) that burned or blew on my mac mini

Tue, 27 Jan 2026 17:42:50 -0700

Hey guys, My 2018 mac mini has been known to be super hot but recently (That I noticed at least) it has been thermal throttling like crazy to an unbearable crawl. I tried to use an app to put the fan and full boar but it didn't seem to do anything. I decided to open it up to see if the fan died. After I opened it and tested it to confirm the fan does indeed not spin I pull it off and noticed a couple or at least 1 scorched component. Can you guys help me identify the component i think thats the reason the fan is not being powered.

⟐ Edited January 27, 2026 at 17:42 MST

Mac mini Late 2018: Is it possible to upgrade the hard drive in the 2018 Mac Mini?

Tue, 18 Nov 2025 22:59:26 -0700

AS the title suggests. I’ve seen guides for the memory, but nothing about the hard drive. Their 1tb drive is $400, and 2tb is $800.

⟐ Answered November 18, 2025 at 22:59 MST

Mac mini Late 2018: What PSU connector is used?

Mon, 17 Nov 2025 02:21:56 -0700

Planning a battery powered MAC Mini 2018. It seems to have an additional row of pins compared to the previous 85w 2014 model. Does anyone know the pin out of this, and also if apple’s using a custom connector or if it’s a standard one I could find and crimp? Thanks!:)

⟐ Answered November 17, 2025 at 2:21 MST

Mac mini Late 2018: Mac mini stuck in boot loop after Sequoia upgrade

Sat, 30 Aug 2025 09:53:00 -0700

I’m working on a 2018 Mac mini (i7, 16GB RAM, 2TB SSD) that’s stuck in a boot loop following an upgrade to macOS Sequoia.

Sometimes it reaches the desktop before crashing, other times it crashes during login.
I’ve reset PRAM/NVRAM, booted in Safe Mode, and run Apple Diagnostics (no hardware issues).
Disk Utility shows no errors, and I’m currently attempting a macOS reinstall without success.
The issue started after the upgrade, but I don’t have full details since this is a client’s machine.

Any insights on next steps? Would a clean install or T2 DFU restore be necessary?

Thanks in advance!

 Chris Leeds

Independent Apple Specialist

Well Connected Life

⟐ Commented August 30, 2025 at 9:53 MST

Mac mini Late 2018: My HDMI is destroyed, how impossible is it to replace? Where can I buy

Fri, 28 Mar 2025 14:00:45 -0700

I purchased this Mac Mini (2018 model) and the HDMI port is trashed (all pins are bent to hell like someone dug in it with a screwdriver) I know it turns on and works, just no way to output video. Can the port be replaced? where can I buy the parts?

⟐ Commented March 28, 2025 at 14:00 MST

Mac mini Late 2018: MacMini Main Logic Board Replacement

Mon, 12 Aug 2024 03:54:38 -0700

Hello

I’m wondering if I can replace the Mainboard from my Macmini Late 2018 to Macmini with M2 Pro. Does. Enclosure of both looks same, all the buttons location, cooling inlet and sockets. Does it require any additional actions while replacement? Need to change any PSU?

I couldn’t find any exact information about it…

⟐ Answered August 12, 2024 at 3:54 MST

Mac mini Late 2018: Any way to tell if overvoltage occurred?

Wed, 26 Jun 2024 11:52:49 -0700

This night, after a thunder strike my Mac Mini 2018 shut down, and my display said "No Signal". I turned it back on a minute later or so and yet I can not detect damage.

I wonder if it was a brief outage or overvoltage. I have a power strip connected to a wall outlet, and all my devices are connected to this strip.

I looked for previous shutdown causes/codes.

Actually, I managed to find the shutdown code which is -3

According to this:

https://cdn.utf9k.net/questions/macos-ch...

-3 indicates thermal issues.

Just for grins, I pulled the power strip off the wall socket to see what shutdown code would I get, and interestingly I again got shutdown code -3.

Do these indicate that brief outage was a more likely cause than a power surge?

⟐ Commented June 26, 2024 at 11:52 MST

Mac mini Late 2018: Can anyone identify this chip?

Mon, 03 Jun 2024 17:02:49 -0700

My Mac mini won't power on and only thing I can see on the boar that looks blown is this

⟐ Commented June 03, 2024 at 17:02 MST

Mac mini Late 2018: Mac Mini 2018 No Power

Wed, 29 May 2024 12:30:55 -0700

Hi all, I’ve got a dead Mac Mini. I have confirmed the power supply is not the issue, outputting 12V via 7 pins which is as expected for this model. Something is wrong on the mainboard and I think I’ve identified the faulty component. Looks like an inductor? Plastic is melted on one side of it and it’s close to the power supply connection. Can someone please help me identify the component, I’ll need to source a replacement. Pics attached. It is the component labelled R10 1945.

Thanks!

@vogelek23 wondering if you can assist? A couple of years ago you helped me identify a couple of components on a 2014 mac mini board. Thanks!

⟐ Commented May 29, 2024 at 12:30 MST

Mac mini Late 2018: A1993 Mac Mini 2018 Not turning on, PSU delivering 12v to 7 pins

Fri, 12 Apr 2024 16:26:11 -0700

Hello there,

I have a Mac Mini 2018 A1993 and it's not turning on at all. When I plug in a power lead and press the power button there are no LEDs and the fan doesn't spin.

I tested the pins on the PSU and 7 of them were 12V. Power to the LEDs and fans were active. The power button does work completely fine too.

Could anyone offer any advice on what I could do to diagnose/repair this?

⟐ Commented April 12, 2024 at 16:26 MST

Mac mini Late 2018: What is this Wi-Fi connector called?

Fri, 12 Apr 2024 15:51:54 -0700

I was opening the A1993 Mac Mini and broke the Wi-Fi connector. This is what the other looks like, does anyone know what it's called?

⟐ Answered April 12, 2024 at 15:51 MST

Mac mini Late 2018: RAM speed: 2666Mhz or 3200Mhz

Thu, 21 Mar 2024 16:11:49 -0700

For a new model Intel Core i7 6‑core 3,2GHz (with Turbo Boost to 4,6GHz) one manifacturer propose RAM with two speeds: one with 2666Mhz and one with 3200 Mhz. Making sense to use the one with the highest speed on this MINI?

⟐ Commented March 21, 2024 at 16:11 MST

Mac mini Late 2018: Can I upgrade the factory NIC to 10Gbe?

Sun, 10 Mar 2024 13:02:30 -0700

Can I upgrade the factory NIC to 10Gbe?

⟐ Answer accepted March 10, 2024 at 13:02 MST

Mac mini Late 2018: SSD Upgrade possibilty or soldered onto board?

Mon, 19 Feb 2024 14:53:21 -0700

Eager to find out if it will be possible to user upgrade the PCIE SSD.

⟐ Commented February 19, 2024 at 14:53 MST

Mac mini Late 2018: The status indicator light is on once connected to power

Sat, 09 Dec 2023 13:31:41 -0700

My mac mini i7 cannot send video signal to monitor (black screen). I found the indicator light will immediately on (white) once I connected this Mac mini to power. Press the power button for 10 seconds, I can turn off the Mac min and the light also turned off. the light will be on if unplug and replug in .

⟐ Commented December 09, 2023 at 13:31 MST

Mac mini Late 2018: After Sonoma upgrade random shut downs, RAM failing according to Apple

Wed, 06 Dec 2023 06:05:06 -0700

I installed some 32 RAM into my 2018 MAC MINI it randomly shuts down often after Sonoma Upgrade. Apple says the RAM keeps failing is this a common occurrence?

⟐ Commented December 06, 2023 at 6:05 MST

Mac mini Late 2018: Connection Cables For Apple Mac Mini i3 A1993 2018

Fri, 17 Nov 2023 07:25:49 -0700

I have purchased an Apple Mac Mini i3 A1993 2018 but it did not come with any connection cables except for the Power Lead, could you please let me know what I need to start up the Mac and recommend which ones are best; I will be using a Dell Optiplex Moniter.

Regards, Savlen

⟐ Commented November 17, 2023 at 7:25 MST

Mac mini Late 2018: Connecting a Dell Optiplex Moniter to Mac Mini i3 A1993 2018

Mon, 13 Nov 2023 14:32:45 -0700

In this case I am sure that the Mac i3 is functioning and that the Dell Optiplex Moniter is also functional; there is no USB port on the Moniter.

Previously I had an Apple A1347 Mac Mini running with a Vodafone Router and I am using the same cables now, but there is no responce from the Moniter, the Dell Self Test only appears and moves around on the screen.

The ethernet cable is functioning on my PC and I also use a Net Gear Prosafe GS105 with cross over cables on the PC.

I now have a Shell Energy Router DGA0122NLK and I am not absolutely sure if I am using the correct ports on it as not much details were sent, but it works for my Viglen Genie PC.

What I realy want to do is get the Mac Mini, Coffee Lake running the PC is only a server computer in this situation.

⟐ Answer edited November 13, 2023 at 14:32 MST

Mac mini Late 2018: Power button cable pinout for remote

Mon, 25 Sep 2023 06:07:34 -0700

Hey,

I would like to have my own power button as I can’t reach it where its located on the mini’s case.

Wake up on LAN is not what I want. On the older 2012 Mac Mini I just used the cable that went to the power button. Now its a ribbon cable, 6 pin I think, I can’t solder that.

Does anybody know what the unused connections on the power supply are good for. Can it be done with them?

Thanks

projekt2501

⟐ Commented September 25, 2023 at 6:07 MST

Mac mini Late 2018: No signs of life

Sun, 10 Sep 2023 06:47:05 -0700

Hello all, I purchased a faulty Mac mini and am currently working on a diagnosis and just had a few questions. Firstly, if the ram is faulty would the machine show a white light and beep like previous models of Mac mini. Also, is there a way to know for sure if it’s a logic board or a power supply?

Thank all :)

⟐ Commented September 10, 2023 at 6:47 MST