Independent guide. Not affiliated with Dortania or the OpenCore Legacy Patcher project.Official project on GitHub
OCLP Field Guideoclp.dev
OCLP 2.5.1/3.0.0 RC5

Macs

Xserve: which macOS each year can run

Every Xserve from 2006 to 2009: Apple's last macOS and what OpenCore Legacy Patcher adds. OCLP supports Xserve models from 2008 to 2009.

Checked against OCLP 2.5.1 and 3.0.0Updated
On this page 7 sections
  1. Every Xserve at a glance
  2. How the Xserve hardware changed, year by year
  3. Where Xserve owners report trouble
  4. Xserve 2006
  5. Xserve 2008
  6. Xserve 2009
  7. Installing a newer macOS on these models
YearModel identifiersApple's last macOSWith OCLP
Xserve 2006Xserve1,1LionNot supported
Xserve 2008Xserve2,1LionBig Sur → Tahoe
Xserve 2009Xserve3,1El CapitanBig Sur → Tahoe

Every Xserve at a glance

  • Apple supported by Apple, no patcher needed
  • OCLP runs with OpenCore Legacy Patcher
  • Legacy runs with OCLP; older “legacy Metal” GPU, more patches
  • No Metal runs with OCLP; GPU without Metal, apps that need Metal fail
  • No not possible
Mac (model identifier)Catalina10.15Big Sur11Monterey12Ventura13Sonoma14Sequoia15Tahoe26Golden Gate27Our pick
Xserve
Xserve (Late 2006)Xserve1,1NoNoNoNoNoNoNoNoLion
Xserve (Early 2008)Xserve2,1NoOCLPOCLPOCLPOCLPOCLPOCLPNoSequoia
Xserve (Early 2009)Xserve3,1NoNo MetalNo MetalNo MetalNo MetalNo MetalNo MetalNoMonterey

How the Xserve hardware changed, year by year

Each line compares a year with the one before it, using the CPU, graphics, Wi-Fi and root-patch data in OCLP's source. It shows why one year behaves differently from its neighbour.

  • 2006 → 2008: CPU: Core 2 Duo (Penryn) replaces Core 2 Duo (Conroe/Merom); Tahoe root patches: new Legacy USB 1.1 and Modern Audio.
  • 2008 → 2009: CPU: Core i (Nehalem/Westmere) replaces Core 2 Duo (Penryn); graphics: NVIDIA GeForce (Tesla) replaces R500; Apple's last macOS moves from Lion to El Capitan; Tahoe root patches: new Nvidia Tesla.

Where Xserve owners report trouble

1 issues in OCLP's tracker were filed with a Xserve model as the machine model; 1 supported Xserve model has no report at all. By keyword match, the topics that come up most are black screen or boot failure (1). The models with the most reports: Xserve (Early 2008) Xserve2,1 (1). These are owners' reports, not confirmed bugs, and most were filed in 2021 and 2022 on early OCLP versions.

Xserve 2006

Short answer

Apple's last macOS for the Xserve 2006 is OS X Lion. OpenCore Legacy Patcher supports Macs from 2008 onwards with a 64-bit Intel CPU and firmware; this one is not on its list, so newer macOS is not possible with OCLP. See older macOS options.

Xserve (Late 2006)Xserve1,1

Model identifier
Xserve1,1
Board ID
Mac-F4208AC8
CPU generation
Core 2 Duo (Conroe/Merom)
Graphics
R500
Wi-Fi
—
Last macOS from Apple
OS X Lion
T1 / T2 chip
None

Best choice

OS X Lion

OpenCore Legacy Patcher does not support this Mac (it needs a 64-bit Intel Mac from 2008 or later). Its last macOS is OS X Lion.

No issue in OCLP's tracker was filed with Xserve1,1 as the machine model (searched 2026-11-05), so there is no owner feedback to summarise for this exact model.

Xserve 2008

Short answer

Apple stopped at OS X Lion. With OpenCore Legacy Patcher the Xserve 2008 runs macOS Big Sur through macOS Tahoe 26. Our pick for most people: macOS Sequoia. No Intel Mac can run macOS 27.

Xserve (Early 2008)Xserve2,1

Model identifier
Xserve2,1
Board ID
Mac-F42289C8
CPU generation
Core 2 Duo (Penryn)
Graphics
R500
Wi-Fi
—
Last macOS from Apple
OS X Lion
T1 / T2 chip
None

Our pick

macOS SequoiaNewest possible: macOS Tahoe

Graphics: R500, patched as none needed. Sequoia is the newest macOS the stable OCLP 2.5.1 supports. How we pick

Xserve2,1: macOS Big Sur to Tahoe, and what OCLP patches on each
macOSStatusRoot patches OCLP applies
macOS Big Sur11.7.11OCLPOpenCore only, no root patches
macOS Monterey12.7.6OCLPOpenCore only, no root patches
macOS Ventura13.7.8OCLPLegacy USB 1.1
macOS Sonoma14.8.9OCLPLegacy USB 1.1
macOS Sequoia15.8.2OCLPLegacy USB 1.1
macOS Tahoe26.7.2OCLPModern Audio · Legacy USB 1.1
macOS Golden Gate27NoNo Intel Mac can run macOS 27, with or without OCLP.

Compared with the Xserve (Late 2006) Xserve1,1

WhatXserve1,1Xserve2,1
CPUCore 2 Duo (Conroe/Merom)Core 2 Duo (Penryn)
  • Root patches on Tahoe. New compared with the Xserve (Late 2006): Modern Audio and Legacy USB 1.1.

How much patching Xserve2,1 needs on each macOS

macOSPatch setsFiles installedFiles removedKDKMetallibSupportPkg
Big SurOpenCore only00NoNo
MontereyOpenCore only00NoNo
VenturaLegacy USB 1.110NoNo
SonomaLegacy USB 1.150NoNo
SequoiaLegacy USB 1.170NoNo
TahoeModern Audio · Legacy USB 1.180YesNo

OCLP installs 0 files for this Mac on Big Sur and 8 on Tahoe. A Kernel Debug Kit is needed from Tahoe.

From OCLP's own documentation

Universal Control. Wi-Fi and Bluetooth hardware: N/A. Not out of the box. Install a PCIe BCM943602CD card Dortania, Universal Control guide

OCLP changelog entries that name this Mac, newest release first, word for word:

  • 3.0.0 Fix MacPro3,1/Xserve2,1 Dual CPU panic on macOS 15+ (Jazzzny)
  • 2.0.0 8 cores can be re-enabled for older OSes in the GUI: → Settings -> Build -> MacPro3,1/Xserve2,1 Workaround
  • 2.0.0 Supporting Macs with Metal and non-Metal-based graphics: → Xserve2,1 - 3,1
  • 2.0.0 Xserve2,1 - 3,1 → Xserve2,1 can only boot with 4 cores max currently
  • 2.0.0 Xserve2,1 - 3,1 → 8 cores can be re-enabled for older OSes in the GUI:
  • 0.0.22 Add basic support for Xserve2,1

On Tahoe this Mac needs Modern Audio and Legacy USB 1.1. What each of those restores, and what to keep ready when root patching: macOS Tahoe: what works and what does not.

Known issues

  • Recommend upgrade to Metal GPU Dortania, Supported Models
  • non-Metal GPU (macOS 11+) (source) Dortania, Supported Models
  • USB 1.1 (macOS 13+) (source) Dortania, Supported Models
What OCLP puts on the EFI partition for Xserve2,1 OpenCore 1.0.6 RELEASE · 22 kexts

From our build with the OCLP 3.0.0-rc.5 app's command line (--build --model Xserve2,1) on a GitHub macOS runner, 2026-11-05. Boot arguments: keepsyms=1 debug=0x100 -lilubetaall -nomt_core shikigva=128 unfairgva=1 -wegtree -btlfxallowanyaddr.

Kexts Reasons are shown for kexts that set this Mac apart; the rest are explained in the kext glossary.

  • Lilu.kext 1.7.2
  • AAAMouSSE.kext 0.95-Dortania Translates SSE4.2 instructions to compatible code for SSE4,1 CPUs, required for AMD Metal drives Needed on: MacPro3,1.
  • telemetrap.kext 1.0.0 Ensures telemetry.plugin doesn't run, required for SSE4,1 CPUs Needed on: Penryn CPUs.
  • CryptexFixup.kext 1.0.5
  • NoAVXFSCompressionTypeZlib.kext 12.3.1 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • NoAVXFSCompressionTypeZlib-AVXpel.kext 12.6 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • NoAVXFSCompressionTypeZlib-AVXpel-Tahoe.kext 26.7 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • AppleIntelCPUPowerManagement.kext 1.0.0
  • AppleIntelCPUPowerManagementClient.kext 1.0.0
  • ASPP-Override.kext 1.0.1 Forces ACPI_SMC_PlatformPlugin to outmatch X86PlatformPlugin and disable firmware throttling
  • AppleIntel8254XEthernet.kext 1.0.0 Resolves Ethernet Support on MacPros Needed on: MacPro3,1 - 5,1.
  • ECM-Override.kext 1.0.0
  • CatalinaIntelI210Ethernet.kext 1.0.0
  • WhateverGreen.kext 1.7.1 Patches GPU Frameworks and kext to ensure proper support Needed on: All models require when spoofing or have non-stock GPU.
  • AppleALC.kext 1.6.3-Jazzzny
  • BlueToolFixup.kext 2.7.2
  • Bluetooth-Spoof.kext 1.0.0 Injects extra data into certain bluetooth chipsets for recognition by the system Needed on: Models with the BCM2070 or BCM2046 chipsets.
  • AppleIntelPIIXATA.kext 1.0.1 Fix IDE support on MacPro3,1 Needed on: MacPro3,1.
  • AppleIntelPIIXATA-Monterey.kext 1.0.0 Fix IDE support on MacPro3,1 Needed on: MacPro3,1.
  • AppleRAIDCard.kext 1.0.0
  • AMFIPass.kext 1.4.1
  • RestrictEvents.kext 1.1.7

Settings specific to this Mac

  • Fixing CPU startup ordering 2 of 86 builds
  • Overriding ACPI SMC matching 41 of 86 builds
  • Disabling memory error reporting 5 of 86 builds
  • Fixing AVX hardcoding in JavaScriptCore 31 of 86 builds
  • Setting RestrictEvents block arguments: pcie 5 of 86 builds
  • Setting RestrictEvents patch arguments: sbvmm,jsc 28 of 86 builds

9 more settings are applied to most of the 86 Macs we built; they are listed in the full build log.

Full build log · config.plist · file list

Our build for Xserve2,1 loads 22 kexts in an EFI folder of 18.1 MB. Across the 86 Macs we built, the median is 18; 70% of builds load fewer.

What owners reported for Xserve2,1 1 report on GitHub

1 issue was filed in OCLP's tracker with Xserve2,1 as the machine model (1 closed, 0 open), filed 2021; the newest is from 2021-04-09. The topics that come up most, by keyword match in the title and text: black screen or boot failure (1). These are owners' reports, not confirmed bugs, and all of them were filed on OCLP versions from before 2024, so many describe problems that have since been fixed.

  • #135 2021-04-09 · closed · 1 comment Xserve2,1 being reported as not compatible model in opencore patcher builder

Xserve 2009

Short answer

Apple stopped at OS X El Capitan. With OpenCore Legacy Patcher the Xserve 2009 runs macOS Big Sur through macOS Tahoe 26. Our pick for most people: macOS Monterey (its GPU has no Metal support, so newer versions lose more apps). No Intel Mac can run macOS 27.

Xserve (Early 2009)Xserve3,1

Model identifier
Xserve3,1
Board ID
Mac-F223BEC8
CPU generation
Core i (Nehalem/Westmere)
Graphics
NVIDIA GeForce (Tesla)
Wi-Fi
—
Last macOS from Apple
OS X El Capitan
T1 / T2 chip
None

Our pick

macOS MontereyNewest possible: macOS Sequoia

Graphics: NVIDIA GeForce (Tesla), without Metal. Monterey keeps the most apps working on it. How we pick

Xserve3,1: macOS Big Sur to Tahoe, and what OCLP patches on each
macOSStatusRoot patches OCLP applies
macOS Big Sur11.7.11No MetalNvidia Tesla
macOS Monterey12.7.6No MetalNvidia Tesla
macOS Ventura13.7.8No MetalNvidia Tesla · Legacy USB 1.1
macOS Sonoma14.8.9No MetalNvidia Tesla · Legacy USB 1.1
macOS Sequoia15.8.2No MetalNvidia Tesla · Legacy USB 1.1
macOS Tahoe26.7.2No MetalNvidia Tesla · Modern Audio · Legacy USB 1.1
macOS Golden Gate27NoNo Intel Mac can run macOS 27, with or without OCLP.

Compared with the Xserve (Early 2008) Xserve2,1

WhatXserve2,1Xserve3,1
CPUCore 2 Duo (Penryn)Core i (Nehalem/Westmere)
GraphicsR500NVIDIA GeForce (Tesla)
StorageSATA 3.5, PATASATA 3.5
EthernetIntel 80003ES2LANIntel 82574L
Last macOS from AppleOS X LionOS X El Capitan
  • Root patches on Tahoe. New compared with the Xserve (Early 2008): Nvidia Tesla.
  • Kexts OpenCore loads. Added: Intel82574L.kext and CSLVFixup.kext. Dropped: AAAMouSSE.kext, telemetrap.kext, AppleIntel8254XEthernet.kext, AppleIntelPIIXATA.kext and AppleIntelPIIXATA-Monterey.kext. (22 kexts on the Xserve (Early 2008), 19 here, from our builds.)

How much patching Xserve3,1 needs on each macOS

macOSPatch setsFiles installedFiles removedKDKMetallibSupportPkg
Big SurNvidia Tesla1125NoNo
MontereyNvidia Tesla1525NoNo
VenturaNvidia Tesla · Legacy USB 1.11725YesNo
SonomaNvidia Tesla · Legacy USB 1.12125YesNo
SequoiaNvidia Tesla · Legacy USB 1.12525YesNo
TahoeNvidia Tesla · Modern Audio · Legacy USB 1.12725YesNo

OCLP installs 11 files for this Mac on Big Sur and 27 on Tahoe. A Kernel Debug Kit is needed from Ventura.

From OCLP's own documentation

Universal Control. Wi-Fi and Bluetooth hardware: N/A. Not out of the box. Install a PCIe BCM943602CD card Dortania, Universal Control guide

OCLP changelog entries that name this Mac, newest release first, word for word:

  • 1.4.0 Restore support for USB 1.1 on macOS 14.4 and newer → Applicable for Penryn Macs, Xserve3,1 and MacPro4,1/5,1

On Tahoe this Mac needs Nvidia Tesla, Modern Audio and Legacy USB 1.1. What each of those restores, and what to keep ready when root patching: macOS Tahoe: what works and what does not.

Known issues

  • Recommend upgrade to Metal GPU Dortania, Supported Models
  • non-Metal GPU (macOS 11+) (source) Dortania, Supported Models
  • USB 1.1 (macOS 13+) (source) Dortania, Supported Models
What OCLP puts on the EFI partition for Xserve3,1 OpenCore 1.0.6 RELEASE · 19 kexts

From our build with the OCLP 3.0.0-rc.5 app's command line (--build --model Xserve3,1) on a GitHub macOS runner, 2026-11-05. Boot arguments: keepsyms=1 debug=0x100 -lilubetaall shikigva=128 unfairgva=1 -wegtree -btlfxallowanyaddr amfi=0x80.

Kexts Reasons are shown for kexts that set this Mac apart; the rest are explained in the kext glossary.

  • Lilu.kext 1.7.2
  • CryptexFixup.kext 1.0.5
  • NoAVXFSCompressionTypeZlib.kext 12.3.1 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • NoAVXFSCompressionTypeZlib-AVXpel.kext 12.6 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • NoAVXFSCompressionTypeZlib-AVXpel-Tahoe.kext 26.7 Prevents AVXFSCompressionTypeZlib crash on pre AVX1.0 systems in 12.4+
  • AppleIntelCPUPowerManagement.kext 1.0.0
  • AppleIntelCPUPowerManagementClient.kext 1.0.0
  • ASPP-Override.kext 1.0.1 Forces ACPI_SMC_PlatformPlugin to outmatch X86PlatformPlugin and disable firmware throttling
  • Intel82574L.kext 1.0.0 Resolves Ethernet Support on MacPros Needed on: MacPro3,1 - 5,1.
  • ECM-Override.kext 1.0.0
  • CatalinaIntelI210Ethernet.kext 1.0.0
  • WhateverGreen.kext 1.7.1 Patches GPU Frameworks and kext to ensure proper support Needed on: All models require when spoofing or have non-stock GPU.
  • AppleALC.kext 1.6.3-Jazzzny
  • BlueToolFixup.kext 2.7.2
  • Bluetooth-Spoof.kext 1.0.0 Injects extra data into certain bluetooth chipsets for recognition by the system Needed on: Models with the BCM2070 or BCM2046 chipsets.
  • AppleRAIDCard.kext 1.0.0
  • CSLVFixup.kext 2.6.1
  • AMFIPass.kext 1.4.1
  • RestrictEvents.kext 1.1.7

Settings specific to this Mac

  • Overriding ACPI SMC matching 41 of 86 builds
  • Disabling memory error reporting 5 of 86 builds
  • Fixing AVX hardcoding in JavaScriptCore 31 of 86 builds
  • Setting RestrictEvents block arguments: pcie 5 of 86 builds
  • Setting RestrictEvents patch arguments: sbvmm,jsc 28 of 86 builds

10 more settings are applied to most of the 86 Macs we built; they are listed in the full build log.

Full build log · config.plist · file list

Our build for Xserve3,1 loads 19 kexts in an EFI folder of 18.1 MB. Across the 86 Macs we built, the median is 18; 51% of builds load fewer.

No issue in OCLP's tracker was filed with Xserve3,1 as the machine model (searched 2026-11-05), so there is no owner feedback to summarise for this exact model.

Installing a newer macOS on these models

Update the firmware first by installing the newest macOS Apple offers for your model, back up, then follow How to install OpenCore Legacy Patcher: build OpenCore for your model identifier, create the installer on a USB drive, install, then run Post-Install Root Patch.

Memory

Macs with 2 GB of memory cannot install macOS Sonoma or newer (Dortania, Supported Models). Upgrade the memory first if your Mac allows it.

Keep going

Mac compatibilityEvery Intel Mac and the macOS it can run, with and without OCLPHow to installThe complete step-by-step guide for OCLP 3.0macOS TahoemacOS 26 on unsupported Macs with OCLP 3.0

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