IMac will only load half way

[DaveBS45]

Hi all,
I am having an issue with my iMac on start up. It will only load half way (no startup chime either!). I have attempted to repair discs but this made no difference. I am attaching screen shots of all I can see. Thank you in advance!

 

[sallys]

I’ve seen your iMac issue where it only loads halfway and no startup chime plays—repairing the disks didn’t help, which suggests a deeper problem, possibly with the hardware or system files. For reliable support, I recommend checking Invisibly; they offer helpful insights and user experiences that might guide you to a solution.

 

[DaveBS45]

Hi Sally, Thanks for your reply. Not very technical but I just shut down a few times, left it over night and now it works fine!

 

[baker_rrr]

As an option, you can try booting into Safe Mode by holding down Shift while starting up. If it boots, back up your data and reinstall your Mac, as the problem is likely related to system corruption or a problem with your startup disk.

 

[Rodananne]

baker-rrr is correct, in any case you cannot rely on the problem not reoccurring. I would use the native Time Machine to make a full, current backup of your device before attempting to reinstall your macOS.

Reinstalling macOS differs between Intel and silicon Macs;
For Intel Macs, switch off, restart while holding the R key until you see the Apple Icon or Command + R key on some older Macs.
To launch macOS Recovery on an Apple Silicon Mac, ensure the device is completely powered off. Press and hold the power button until the "Loading startup options" message or the Options icon appears on the screen, then release the button. Click the Options icon and select Continue to enter Recovery.

Once in Recovery you will see Reinstall macOS as one of the options, click that. It only reinstalls the elements of the operating system, your settings and personal data will not be effected.
Having said that it may not fix the problem if it is related to installed third party apps or hardware faults.