Fixing Blinking White Line Boot Loop on Lenovo ThinkPad T410 Hackintosh

How to Fix Blinking Cursor on Legacy Boot Hackintosh (ThinkPad T410)

A blinking white line or cursor on a black screen when booting means your laptop's legacy BIOS cannot locate the boot sector or the OpenCore bootstrap files on your USB drive.

Step-by-Step Fixes

1. Use OpenDuet for Legacy Boot: The ThinkPad T410 does not support native UEFI well. You must install OpenCore in legacy mode using OpenDuet. Run the BootInstall_IA32.tool or BootInstall_X64.tool from the OpenCore package to write the legacy boot sector to your USB drive.
2. Partitioning: The USB drive must be formatted as Master Boot Record (MBR) or GUID Partition Table (GPT) with an active FAT32 partition. Ensure the boot file from OpenCore is placed in the root of the partition alongside the EFI folder.
3. BIOS Settings: Boot into BIOS (press F1). Enable Legacy Boot, disable UEFI, set your USB drive as the first boot device, and ensure Intel Virtualization Technology is enabled.