![]() (I have created Time Machine backups with Big Sur, and I have restored them using Big Sur, but I have not yet tried to access Big Sur Time Machine backups using previous macOS releases.) I repeat, do a Time Machine backup before upgrading!! Big Sur changes how Time Machine backups are done, and I have heard that it is not possible to use previous versions of macOS to recover data from Big Sur's Time Machine backups. Remember that you do this at your own risk, you could lose all your data (it's your responsibility to do a Time Machine backup first!), expect bugs and crashes, and this patcher is still under development. This documentation is more thorough than for previous versions of this patcher, but it may still be incomplete. In addition, thanks to Ben Sova, MachInit, johncaling40, and Travis Parker for their contributions to this patcher. Ausdauersportler for integrating patches for iMac Metal GPU support.This turned out to be a good way to make LegacyUSBInjector function under Big Sur, and more generally and more importantly, it was absolutely essential for improving overall patcher reliability. testheit for describing how to use a kmutil feature that I was previously unaware of.ParrotGeek for developing the LegacyUSBInjector kernel extension that allows USB to work on various pre-2011 Mac models, and for creating the "trampoline" that allows the installer to be patched at runtime without first running Terminal commands. ![]() highvoltage12v for developing the first 802.11n Wi-Fi patches for Big Sur (no longer used by default, but still available through the -wifi=hv12v-old and -wifi=hv12v-new options for patch-kexts.sh), as well as patches used for Metal GPU support on 2011 iMacs.jackluke for figuring out how to patch the Recovery USB to bypass compatibility checks and AMFI enforcement in the absence of NVRAM boot-args settings.ASentientBot for developing the Hax series of installer patches which are so incredibly helpful for installing Big Sur on unsupported Macs, as well as for his patch to NVDAResmanTesla.kext which allows the GeForce Tesla (9400M/320M) framebuffer to work in Big Sur.Thanks to the following people for their hard work to get Big Sur running on unsupported Macs: For 2008 Mac Pros (MacPro3,1) in particular, Big Mac is clearly a better option than this patcher (at least for now). You can find more details about the OpenCore tool on GitHub.A primitive USB patcher for installing macOS Monterey on unsupported Macsīy the way, if you have a Mac Pro, Big Mac by StarPlayrX is another patcher worth considering. Of course, some things may not work as expected since the project is an unauthorized modification by Apple and is still in “active development.” This is certainly not the ideal solution for people who still rely on their computers for work, but it’s interesting to see that people still find ways to continue using computers from a decade ago. These are the Mac models that can run macOS Ventura with OCLP: Macs that can run macOS Ventura with OpenCore Despite these restrictions, the latest version of OCLP successfully brings extra life to Macs that have been discontinued by Apple. However, making OCLP compatible with macOS Ventura wasn’t an easy task.Īccording to the developers, Apple has removed most of the legacy drivers from macOS 13 since this version no longer supports any Macs with Intel CPUs older than the seventh generation. Two months after the release of the first beta of macOS Ventura, the developers behind OCLP demonstrated some old Macs running macOS Ventura thanks to this tool. The tool is based on the same OpenCore bootloader used for Hackintosh, which is a well-known method for running macOS on regular PCs. While this tool was previously a beta software, the official release of OpenCore 6.0 is now available for any user who wants to try it.Īs we previously covered here on 9to5Mac, “OpenCore Legacy Patcher” (or just OCLP) is a tool that allows older Macs to run macOS Big Sur and Monterey without official support from Apple. Earlier this year, a group of developers created a tool that lets users install macOS Ventura on unsupported Macs, such as the “trash can” Mac Pro.
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