Thanks Sam. 

Are you free for a chat today, please?

Jonathan Brady
[email protected]
Tel: +447931541489

> On 31 Aug 2022, at 07:20, Sam - MacAmbulance <[email protected]> wrote:
> 
> Hi Jonathan 
> 
> Fusion Drives, or anything with a spinning disk component, and a version of 
> macOS beyond Mojave will run unbearably slowly. The new APFS disk format is 
> great, but only on solid state drives. Performance is absolutely miserable on 
> spinning disk drives. This made worse by Apple reducing the SSD portion of 
> the Fusion Drives down to 24GB, so while your Mac technically has a Fusion 
> Drive, the vast majority of it is spinning disk.
> 
> You could replace the spinning disk part of the Fusion Drive with an SSD, it 
> involves backing up your data, replacing the drive, rebuilding a new Fusion 
> Drive and restoring your data. I’ve upgraded a lot of Fusion Drives recently 
> and the Macs run faster than the day they were bought.
> 
> The slow startup is most likely down to a bad sector on the spinning disk 
> drive, so while the Fusion Drive’s able to read the directory stored on the 
> SSD, it could be experiencing drive faults reading from the spinning disk. Do 
> you have a recent backup? If yes, your best bet is to install the SSD and 
> restore from that.
> _
> Regards
> Sam Mullen
> 
> +44 (0)7747778022
> [email protected]
> www.macambulance.com
> 
> 
> MacAmbulance Ltd.
> Providing Affordable Mac/PC Support and Web Development
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> 
>> On 30 Aug 2022, at 19:46, Jonathan Brady <[email protected]> wrote:
>> 
>> Good evening all.
>> 
>> I have an iMac circa 2013 21.5” running macOS 10.15.7. with a fusion drive. 
>> Of late it has been slowing down and I have been looking to replace it with 
>> a refurb iMac of similar size and spec. At the moment, however, it is 
>> struggling to boot up. The opening screen with the apple logo and progress 
>> bar take roughly 15-30 minutes to reach the login screen.  When I enter my 
>> login details, the mouse cursor becomes the spinning beach ball for another 
>> ten or so minutes before the iMac reboots itself and the process continues. 
>> I have unplugged all usb devices and also forced a shut down using the power 
>> button, disconnected and reconnected the power supply and restarted - but to 
>> no avail.  The reboot/login loop continues. 
>> 
>> Am I witnessing the death of my iMac? Fortunately, I have a time machine 
>> backup which I was going to use to setup the replacement iMac with. 
>> 
>> Any suggestions on how to break the reboot/login loop would be greatly 
>> appreciated. 
>> 
>> Many thanks,
>> 
>> Jonathan Brady
>> [email protected]
>> 
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