With thanks to Dan - for taking so much of your time to advise me.
The one constant in everything I’d been doing was trying to reinstall from the original Mac OS X 10.06 Snow Leopard DVD. It was what came with the iMac originally, so would be the best option … you’d think.
What is it they say? If you keep doing the same thing you keep getting the same results! So change of tack; I created a boot USB for Mac OS 10.12 Sierra using TransMac on my PC and have installed that instead. (Links for doing that below. Ta DA! Absolutely painless install process, and the system is running perfectly. I’m on it now.
Officially my mid-2010 A1311 Intel i3 3.03 GHz iMac with 4GB RAM doesn’t support Sierra, but everything seems fine. If it continues to be stable I’ll upgrade the RAM to 8GB to bring it closer in line with what’s required for Sierra.
So … advice for anyone struggling with persistent Snow Leopard stability issues; ditch it for a later OS.
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To create a macOS install USB; have a look at https://www.youtube.com/watch?v=VgLQUjZXpSQ
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To create a macOS install USB; have a look at https://www.wikigain.com/create-macos-high-sierra-bootable-usb-installer-windows-10/.
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I used:
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I did it on my Windows 7 PC as the iMac was inoperable :
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* MacOS Sierra DMG file download: https://drive.google.com/file/d/0B-P9...
Hi
Solved. At last.
With thanks to Dan - for taking so much of your time to advise me.
The one constant in everything I’d been doing was trying to reinstall from the original Mac OS X 10.06 Snow Leopard DVD. It was what came with the iMac originally, so would be the best option … you’d think.
What is it they say? If you keep doing the same thing you keep getting the same results! So change of tack; I created a boot USB for Mac OS 10.12 Sierra using TransMac on my PC and have installed that instead. (Links for doing that below. Ta DA! Absolutely painless install process, and the system is running perfectly. I’m on it now.
Officially my mid-2010 A1311 Intel i3 3.03 GHz iMac with 4GB RAM doesn’t support Sierra, but everything seems fine. If it continues to be stable I’ll upgrade the RAM to 8GB to bring it closer in line with what’s required for Sierra.
So … advice for anyone struggling with persistent Snow Leopard stability issues; ditch it for a later OS.
To create a macOS install USB; have a look at https://www.youtube.com/watch?v=VgLQUjZXpSQ
I used:
* MacOS Sierra DMG file download: https://drive.google.com/file/d/0B-P9...
* TransMac download: http://www.acutesystems.com/tmac/tmse...