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Such was the case with macOS Big Sur, and this tendency continues with the recent release of macOS Monterey. Since the release in 2020 of the first Mac models that use the new Apple M1 chip rather than Intel processors, Apple has started rapidly moving away from Intel CPUs and, as a result, is dropping its support for Intel-based Macs in its latest macOS versions. With the help of the OpenCore Legacy Patcher, you can run macOS versions on unsupported computers.
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Remember if you ZAP your PRAM, you'll need to use your USB 2.0 Drive instead.OpenCore Legacy Patcher is a software tool that allows PC users and owners of older Mac models to install newer macOS versions on their machines. Once you have disabled SIP and authenticated-root, you can install BigMac 2 to an internal SSD or Harddrive on a 32GB APFS Partition. Recommended Flash Drive or a USB 2.0 / 3.0 SSDįor Big Mac 2 installer disks, I use Samsung Flash Drive FIT Media 32GB.
It will be removed from future versions of bigmac2. I run an RX 580 8GB flashed and a Radeon Pro WX4100 non flashed.
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With Race Condition, a full system seems to boot better when not in Verbose mode.If the progress bar boots slowly and not far, that usually means that it will boot up.USB 2.0 devices will only work with a USB 3.0 Hub or Switch.We will be testing IntelWireless WiFi / BT combo cards soon with third party drivers.Having zero luck with USB Bluetooth cards on Monterery.BlueTooth 4LE 20702B0 Cards are currently only working with beta 1.
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Install any other post install items from bigMac2 and also check Bless and update KCs.įuture OC instructions when BM includes OC integration: Besure to remove the live snapshot on the clone using bigmac delete snapshot. If success, you can now clone your system to BigMac. Now see if the USB 2.0 install boots on your unsupported Mac (this will be slow) Then for all systems, delete the APFS Snapshot by itself In five seconds, the macOS installer will be shown.įor Mac Pro 3,1 run the Telemtery post install by itself These next steps are required to run BigMac2 and CloneToolX from a bigmac2 install disk from a Supported Mac:įrom bigmac2's pre install tab, Launch the installer. Installation of macOS 11.2.3 from a Supported Intel Mac If you cannot disable SIP, do this from a Recovery Disk or Create install media disk. This should stop the Kill -9 errors users have been gettingīigMac2 should behave from the USB 2.0 disk and on Internal SSDs. Boot BigMac 2 up from an external USB 2.0 on an unsupported Mac: Install BigMac 2 to an external hard drive or USB Flash thumb drive (should be relatively fast and min of 32 GB) This will also give you Airdrop and Handoff without any weird hacks. If you want native WiFi and BT4, do yourself a huge favor and get a 802.11ac/BT4LE Broadcom black iMac style combo card. (2009 - 2012 Mac Pros with upgraded firmware do not need this), You can reinstall it later after you run the Disable Bluetooth patchįor 2008 Mac Pros: If you have not installed dosdude1's APFS ROM Patcher, do that first.
If you have Bluetooth 2 EDR Card, remove it. If Bigmac2 app does not run, try resigning it: codesign -force -deep -sign - /Applications/bigmac2.app If running Bigmac2 recovery / install disk from OWC 2.5" SSD, use a 4x PCIe slot (on Mac Pro 3,1 use the 3rd PCIe slot, not the 1st or 2nd 16x slots) First Time User Guide macOS 11.2.3 (from an unsupported Mac) There may be some issues updating to the proper firmware for a new OS version. Update: the race condition may no longer be an issue with current version of Big Sur and Monterey. I lose a PCIe slot, but I can live with that.īecause of race conditions during macOS boot with Mac Pros years 2008 to 2012, Open Core Legacy Patcher is recommended and OCLP can compliement BigMac2. I use the same idea and routed the USB from the Lenovo PCIe card to a USB 3.0 port. Many users are modding the card and re-routing USB to a USB 3.0 card or USB 2.0 Hub. The culprit for my BCM 20702B0 card not working after Monterey Beta 1 is USB.
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This weekend I started experimenting with a Lenovo WiFi 802.11ac/Bluetooth 4.2LE PCIe card using a combination of Open Source drivers that mess well with Apple's and was able to get Handoff working with Monterey Beta 2 and currently have WiFi and BT working on Big Sir 11.2.3 and Monterey Beta 2 and 3. Bluetooth, WiFi, Handoff possible on Monterey (Mac Pro 3,1 4,1 5,1):
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Added Support for macOS Big Sur 11.6.8, macOS Monterey 12.5 as of 8.13.22 For Mac enthusiasts who want to run macOS Big Sur or macOS Monterey on Unsupported Mac hardware.
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