My iMac is getting hot and the Fans are on from time to time .
Trying to understand why.
It seems that Installer Progress is ON after each restart.
Don't know what is it and why.
Any advice will ba appreciated.
Turning ON the iMac with "D" pressed - diagnostic result OK.
iMac 21.5″
That is certainly one option, which exact Mac is it?
What shows as bot options if you hold Option key at power up?
Another option...
Start up from macOS Recovery
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
In Disk Utility>View, select Show all Devices, highlight the top left entry.
APFS won't work for Sierra or earlier, Sierra or earlier needs MacOS Extended Journaled. High Sierra won't work for APFS on earlier Macs.
What has often worked for others is to use this Restore Method instead of CMD+r keys...
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
Messed up Factory Reset on MacBook Pro Mi… - Apple Community
2017 iMac failing to install Sierra in re… - Apple Community
Clean Install of High Sierra: Multiple Fa… - Apple Community
https://discussions.apple.com/thread/255040953?answerId=259391356022#259391356022
Yes you can reinstall over it, it shouldn't mess up any of your data or files...
How much Free space is on your drive?
Try one of these two…
You can use Drive DX to possibly get a better view of Drive health…
https://binaryfruit.com/drivedx
Thanks to Jack-19…
It may be wise to run SMART Utility to check the drives' health.
Ok, you have 3 choices, bolded is what I recommend...
Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Command-R is generally recommended, especially if you never installed macOS Sierra 10.12.4 or later… How to reinstall macOS - Apple Support
Command (⌘)-R
Install the latest macOS that was installed on your Mac.
Option-⌘-R
Upgrade to the latest macOS compatible with your Mac.
Shift-Option-⌘-R
Install the macOS that came with your Mac, or the closest version still available.
What was the lat thing you installed?
Lately OS Updates & Upgrades may take hours to finish & require upto 7 restarts on it's own.
How long have you let it run?
Thanks for your reply.
latest installed was macOS.
I didn’t touch this Installer Progress as I don’t know what it is and where is it.
my iMac didn’t make so much restarts.
what can I do know to finish the progress?
ps. Someone advised me to replace the Fusion Drive with an external SSD.
maybe this direction isn’t the solution…
As my Fusion drive seems to be ok. I think that your direction is logical.
Maybe sone software in background is causing the iMac to get hot and Fans ON.
I have an iMac :
After boot with "hold Option key at power up"
After choosing Macintosh HD and filling my username the iMac is "stack" a few moments until showing the desktop icons.
Can I re install ( Upgrade ) to the latest macOS even I have installed already. ?
Thanks.
I did it. Now leaving the iMac a few more hours without touching to fully finish the macOS installation.
I will update.
ps. I’m with internal Fusion Drive 1TB.
connection via thunderbolt (usb-c) to an external SSD Drive LaCie ( migration ) …
will my iMac perform faster ?
Thanks.
LaCie 1TB Rugged SSD Pro External Drive with Thunderbolt 3 - Apple
Harness top Thunderbolt 3 speeds for playback/recording of up to 2800MB/s on 6K, 8K, and super slo-mo video
Yes it should be, here's my OWC external Boot SSD versus the internal Fusion drive, (bottom), on my 2019 iMac i7...
Ok.
I will buy this ssd and follow these instructions
Use an external SSD as your startup disk … - Apple Community
Thank you !!!!
Thank you very much for your help
Very appreciated !!!!
Great news I could be of help my friend, do take care! :)
Installer Progress is ON after each restart.
