I have a late 2013 MacBook Pro 15" with an NVIDIA GT 750M GPU, and I've been trying to install macOS Sequoia 15.5 using a bootable USB created with OpenCore Legacy Patcher (OCLP) 2.4.0. However, no matter what I try, I keep encountering the same issue: when selecting the hard drive during installation, it shows the error “An error occurred while preparing the installation. Try again.”
I’ve searched extensively for a solution and even re-downloaded the macOS Sequoia 15.5 installer directly from Apple, but the problem persists and I haven’t been able to get it working.
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