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Can I Use iMac As Monitor For Mac Mini ?

My imac 2017 has an issue.first of all Ventura is the last Os that will work on this hardware according to apple.

then there is a problem.when i mac is on sleep ,sometimes doesn't wake up.i disconnect a usb hub and the ethernet but still no reaction.

i force to end its operation by the energy button.and then i restart my imac and everything is fine.also in random timelines i hear a gling-metal noise like 2 coins are dropping into a slot which i read here that might be the hard disc going to failure.

so i was thinking of saving the screen of my imac and use it for a new mac mini .if its possible to connect the 2 devices together and work.

i found this article.its about a connection between an imac 's screen and a pc. and i thought that if it really works with a pc then it should work with a mac mini.


[Edited by Moderator]

iMac 21.5″, macOS 13.7

Posted on Jan 16, 2025 1:16 PM

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Question marked as Top-ranking reply

Posted on Jan 16, 2025 1:30 PM

I'm unfamiliar with that third-party app.


The traditional Target Display Mode won't work here: Use your iMac as a display with target display mode - Apple Support — your iMac is too new.


Your gear is also too old for AirPlay to Mac: Continuity features and requirements for Apple devices - Apple Support


If your iMac hardware is failing, whether the hard disk drive or something else, it's anybody's guess what happens.


Diagnostics won't find transient errors, but might find some errors: Use Apple Diagnostics to test your Mac - Apple Support


If the iMac hard disk is failing, a potential workaround: How to Setup and Use an External SSD as your startup disk… - Apple Community

22 replies

Jan 19, 2025 9:21 AM in response to macman1585

macman1585 wrote:

no ,i meant if i can replace my hard disc when/if it fails with the 2011 imac's one.i dont know if its possible to pull it out and place it in mine's hard disc place.

by the way how do we know if a hard disc is failing? which are the most common symptoms? except that gling noise they told me it could be


Better to swap an old and sketchy hard disk with a newer or new SSD.


Extracting components from most of the iMac 21.5” models is a project.


Look up some You Fix It disassembly videos, and decide for yourself what repairs and upgrades you want to try.


If the existing 2011-old HDD is still working, keep backups, I’d run it into to failing, and replace it with an SSD. This if the goal here is to spend no money on the gear, and the backups can be trusted. (Otherwise: data loss ahead.)


Hard disks fail in various ways, ranging from getting slow, to showing SMART errors, to instant failures.


SMART isn’t overly useful for predicting many sorts of failures. It misses a whole lot of impending failures.


Unless you want to develop skills at disassembly and re-configuring and re-purposing, I’d stick to using external storage. Expect to break pieces while learning, too. Even after. Decade-old clips can just disintegrate.


Or source yourself some less-old gear, as that gets you incrementally newer and better gear, as compared with that 2011, for instance.

Jan 19, 2025 10:19 AM in response to macman1585

To determine if the drive is failing download the free version of DriveDX, run it and post the results in you reply.


Also, to make sure the problem isn't due to 3rd party software run Etrecehck and post the report as I mentioned in my previous post.


It would be difficult to get into the 2017 iMac and replace its existing SSD with the old SSD. If it was like my earlier iMac, it had magnets holding the screen on instead of adhesive as the 2017 has, I think you'd be better served by getting a Thunderbolt external SSD, install Ventura on it and migrate your user data via Migration Assistant and your Time Machine backup of the 2017.

Jan 19, 2025 11:03 AM in response to Old Toad

ok,lets take things one by one.


no i dont have fusion drive,no ssd.


i have never installed any app such as cleaning e.t.c.


also i have never run any of these diagnostic programs not even have installed any of them.i wanted to but opinions vary especially about etrecheck. i never had any serious problem to try them.


now about the hub. i am not sure what you mean about a self powered hub. the hub is a NTC hub ,i have it for almost 20 years ,has 6 ports ,i usually use 3 of them.it is connected with a usb cable to the imac port and with a power cord to the ups plug .


about the sleep mode.oh man, this is a vary debatable subject on the Internet community.many are for it and many against it. some told me ,do you switch off your phone, then why do that to your pc? and such opinions.that metals are doing a hard job trying to turn on the mac and that causes problems to hardware.some others say that in sleep mode imac uses more power e.t.c.

i dont know which is good for my hardware, i decide it to split my decision to both opinions. so i turn on my imac early in the morning and then for the rest of the day to put it in sleep mode when i don't use it.first screen saver for 5 min and then set it to sleep mode automatically.and late at night, i turn it off again until next morning.

i dont really know what you mean ''to go blank'' .what is that?




Jan 19, 2025 11:46 AM in response to macman1585

macman1585 wrote:

…also i have never run any of these diagnostic programs not even have installed any of them.i wanted to but opinions vary especially about etrecheck. i never had any serious problem to try them.


Etrecheck report avoids playing a game of thousands of questions.


Same for DriveDx.


now about the hub. i am not sure what you mean about a self powered hub.

If it plugs into a power socket, it is a powered hub.


If the hub does not plug into, it is a bus-powered hub.


The former usually has the ability to provide more power to connected devices than the host port can provide.


…it is connected with a usb cable to the imac port and with a power cord to the ups plug .


That would be a powered hub. Three hubs and lots of connected devices can be less than stable.


about the sleep mode.oh man, this is a vary debatable subject on the Internet community.many are for it and many against it. some told me ,do you switch off your phone, then why do that to your pc? and such opinions.that metals are doing a hard job trying to turn on the mac and that causes problems to hardware.some others say that in sleep mode imac uses more power e.t.c.

Do ypu

i dont know which is good for my hardware


The default power-management settings provided by Apple are usually a pretty good choice.


The downside with hard disk configurations is that powering down and powering up wears those, which is where that keep-spinning suggestion usually arises with old hard disks.


Pending the Etrecheck and the DriveDx reports, whether there are hard disks drive issues is unconfirmed.


i dont really know what you mean ''to go blank'' .what is that?


A display can be powered down, or can be left powered up and running some screensaver.


The suggestion was to power down the display, which can be configured in System Settings.

Jan 19, 2025 12:15 PM in response to macman1585

MrHoffman answered your questions as well as I could. Etrecheck is one of the best diagnostic apps available for Macs. Its report is totally anonymous and, as MrHoffman has already mentioned, prevents us from playing the game of 20 Questions. We wouldn't recommend them if they weren't totally safe.


But as they say, you can lead a horse to water but can't make him drink. So the next step is up to you as it's your Mac.

Can I Use iMac As Monitor For Mac Mini ?

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