Hackintosh Guide: Booting iMac Mid 2011 from USB Hard Drive
If you're looking to boot your iMac Mid 2011 from a USB hard drive instead of a thumb drive, follow these steps to set up and configure your system:
Prepare the USB Hard Drive:
- Connect the USB hard drive to your iMac Mid 2011.
- Ensure the USB hard drive is formatted correctly for macOS. You can format it using Disk Utility, selecting the "Mac OS Extended (Journaled)" or "APFS" format.
Clone macOS Installations:
- Use a tool like Carbon Copy Cloner to clone your existing macOS installations (High Sierra and Monterey) from their respective partitions on the internal drive to separate partitions on the USB hard drive.
Install OpenCore Legacy Patcher (OCLP):
- Download the latest version of OCLP and install it on the USB hard drive. This will allow you to boot macOS from the USB hard drive.
- Follow the installation instructions provided by the OCLP documentation to properly set up and configure OCLP on the USB hard drive.
Configure OpenCore:
- Customize the OpenCore configuration on the USB hard drive to include entries for both High Sierra and Monterey installations.
- Ensure that the boot entries point to the correct partitions on the USB hard drive where you cloned the macOS installations.
Set Boot Priority:
- Restart your iMac and hold down the Option key during startup to access the boot menu.
- Select the USB hard drive from the boot menu to boot into OpenCore.
- From the OpenCore boot menu, choose either the High Sierra or Monterey installation to boot from.
Test and Troubleshoot:
- Once booted into macOS from the USB hard drive, test the performance and functionality to ensure everything is working as expected.
- If you encounter any issues, refer to the OCLP documentation or online forums for troubleshooting assistance.
By following these steps, you should be able to boot your iMac Mid 2011 from a USB hard drive containing cloned macOS installations of High Sierra and Monterey. This setup will allow you to test the performance of an external SSD connected via Thunderbolt before making a purchase.
With the 1.41 release/Monterey 12.7.4 combo breaking things, I took the opportunity to start over and things are actually better now IMO than I had before.
I have High Sierra on a MacOS Extended partition, and Monterey 12.7.3 in an APFS container disk. (I'm pretty sure I had to go HS 1st to get a working OS, and then Monterey could format the drive as APFS, maybe not but that's what I did) Both boot and run fine and can be chosen from the EFI boot picker
I wanted to clone those to an external SSD drive, and boot either of those from the USB, instead of the old SATA internal
I did a CarbonCopyClone of each partition to separate partitions on the external SSD, and installed OCLP to the SSD. If I hold the option on boot , I can see the external EFI partition, it prompts for the 2 flavors of MacOS, but it boots from the internal.
The goal is to see if a Thunderbolt connected external SSD will run as good as the SATA internal or not, and this USB test is just to get the framework up before I buy a Thunderbolt enclosure.
Thanks in advance for clarifying what I'm missing.
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