Hello, I’m trying to update my iMac mid-2011 with an original GPU AMD Radeon HD x000 512Mo (i don’t remember the exact model).
I’m trying to install MacOS Sequoia 15.5 but I keep running into this error every time I try to install it, it says:
"macOS Update Assistant: An error occurred while preparing the software update."
Any idea how to solve this problem?
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