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rEFIt is a boot menu and maintenance toolkit forEFI-basedmachines like theIntel Macs.You can use it to boot multiple operating systems easily,including triple-boot setups with Boot Camp.It also provides an easy way to enter and explorethe EFI pre-boot environment.

【导读】：awesome-dotnet就是 quozd 发起维护的.Net 资源列表，内容包括：编译器、压缩、应用框架、应用模板、加密、数据库、反编译、IDE、日志、风格指南等。中文版由开源前哨和DotNet微信公号团队维护更新，欢迎在 Github 上.

OSX로 부팅 후 시스템 환경설정의 시동디스크에서 OSX 디스크를 선택. 맥에서도 3 과 같이 부팅될 디스크를 선택할 수 있습니다. 일단 독(Dock)에 있는 시스템환경설정을 클릭한 후 '시동 디스크' 를 찾아 클릭합니다.
A modern pc or Mac operating system. Squirrel is tested mainly on pcs using Windows OS, but should work on Macintosh OSX systems. It is not available for Linux operating systems. The program Igor from Wavemetrics. At least Igor Version 6.38 (or the latest update). The latest version of Igor 7 or 8 is recommended.
The rEFIt Project. REFIt is a boot menu and maintenance toolkit for EFI-based machines like the Intel Macs.You can use it to boot multiple operating systems easily, including triple-boot setups with Boot Camp.

On this page:News- Download- Troubleshooting- Resources
Other pages:Documentation- Troubleshooting- Screenshot- Myths and Facts

News

2013-03-29: As you may have noticed, rEFIt is no longer activelymaintained. Please check outrEFInd,a fork that is maintaned and under active development.

2010-03-12: The site has a newtroubleshooting section.Some common problems are also listed below.

2010-03-07: Version 0.14 was released. This release adds a configurationoption for the default boot choice, fixes the Linux/GRUB detection issue, andfixes Snow Leopard 64-bit issues.

Download

The current release is 0.14.It is available in various forms.Both disk image distributions include the Installer package andcan be burned as a bootable CD as well.All three binary distributions can be used to install rEFIton a USB memory stick or other disk drives.

rEFIt 0.14 (6.5M Mac disk image)
rEFIt 0.14 (6.5M ISO disk image)
rEFIt 0.14 (3.2M .tar.gz)
rEFIt 0.14 source code (253K .tar.gz)

You can browse the source code online through theViewVC interfaceto the Subversion repository at SourceForge.

Troubleshooting

See the troubleshooting section for a full list.Here are a few common problems:

I just installed rEFIt, but the menu doesn’t show up.: It takes two reboots after using the package installer.More...
I can’t boot Windows/Linux from a USB hard disk.: This is not well-supported by Apple’s firmware.More...
I can’t boot Windows/Linux from the second internal hard disk.: This is not explicitly supported by rEFIt at this time.More...

Resources

This project is hosted by SourceForge.You can use the trackers to submitbug reports,feature requests,and patches.The latest development source code is available from theSubversion repository.Other resources are listed on theproject summary page.

To discuss rEFIt with other people, check out theOnMac Forumsor theDual Boot forum at InsanelyMac.

This page provides downloads for all previous versions of OptiX SDK

By clicking the 'Agree & Download' button below, you are confirming that you have read and agree to be bound by the SOFTWARE DEVELOPER KITS, SAMPLES AND TOOLS LICENSE AGREEMENT for use of the SDK package. The download will begin immediately after clicking on the 'Agree & Download' button below.

DOWNLOAD LATEST OptiX SDK

Download OptiX™ SDK 7.1 - (Windows and Linux)

Note: OptiX 7.2 will be released later this week

OptiX SDK for Windows
Version 7.1.0
06/30/2020
DOWNLOAD NOW

OptiX SDK for Linux
Version 7.1.0
06/30/2020
DOWNLOAD NOW

Release Notes (119KB, PDF)

[DEVBLOG] - How to get started with OptiX 7 DevBlog

NOTE: Requires NVIDIA R450 driver or newer. You may need a Beta Driver for certain operating systems.

OptiX 7.1.0 includes support for curve primitives, improved denoising, upgraded debugging utilities, performance improvements and bug fixes.

Release Highlights NVIDIA® OptiX™ 7.1.0 (June 2020)

Added curves as a new type of geometric primitive
Denoiser improvements
Increase instancing limits
Several new device exceptions were added to catch common errors
Fixed support in optix headers for cuda runtime compilation using nvrtc
Enable compaction support for acceleration structures on non-RTX GPUs
OptiX will attempt to reset a corrupted compile disk cache
Improved timeline markings in Nsight Compute
Fixed a crash on non-RTX GPUs when rendering with a refit IAS
Six new SDK samples.

Download OptiX™ SDK 7.0 - (Windows and Linux)

Windows 7 and higher, 64-bit
Accept & Download Linux
Accept & Download

Release Notes (90KB, PDF)

NOTE: Requires NVIDIA R435.80 driver or newer. You may need a Beta Driver for certain operating systems.

OptiX 7 introduces a new low-level CUDA-centric API giving application developers direct control of memory, compilation, and launches while maintaining the programming model and shader types. It also includes a library that provides helper functions to load textures on demand.

Release Highlights NVIDIA® OptiX™ 7.0.0 (Aug 2019)

No host state is maintained. Scene graphs, materials, etc., are managed by the application rather than by OptiX
GPU memory is managed by the application using CUDA. (No OptiX buffers or variables)
GPU launches are explicit and asynchronous using CUDA streams
Shader compilation is explicit (Similar to DXR or Vulkan)
All host functions are thread-safe
Source code for demand loading library is included and designed for direct inclusion in production applications
Multi-GPU operation is managed by the application
OptiX AI denoiser no longer requires redistribution of cuDNN (included in the driver)
New disk caching features offer flexibility for production environments
Improved PTX handling (extended instruction set)
Improved build times (3x to 4x faster on average)
Hit shaders can access triangle vertex data, motion blur data, and the transformation stack
Nsight Compute 2019.4 & NsightVSE 2019.3 Debugger OptiX application profiling support [Coming Soon]
- OptiX RTCore modules are identified
- All public OptiX module and Application/User kernels called by OptiX are visible
- NsightVSE can set breakpoints, inspect GPU state, and debug with expected run control through application code

Download OptiX™ SDK 6.5 - (Windows and Linux)

Windows 7 and higher, 64-bit
Accept & Download Linux
Accept & Download

Release Notes (91KB, PDF)

NOTE: Requires NVIDIA R435.80 driver or newer. You may need a Beta Driver for certain operating systems.

The 6.5.0 release of the OptiX SDK introduces many performance improvements and extended functionality. cuDNN is no longer required to use the OptiX Denoiser and all required files are shipped with the driver. The introduction of demand loaded buffers allows faster startup times by permitting launch calls before all textures are loaded and the ability to render scenes with very large texture sets by loading the required textures and mipmap levels to the device as needed. Support for Nsight tools has also been added in this release.

Release Highlights NVIDIA® OptiX™ 6.5.0 (Aug 2019)

OptiX AI denoiser no longer requires redistribution of cuDNN
New disk caching features offer flexibility for production environments
Improved PTX handling (extended instruction set)
Improved build times (3x to 4x faster on average)
Hit shaders can access triangle vertex data, motion blur data, and the transformation stack
Introduction of demand loaded buffers and textures
- Decreases memory requirements of large texture sets by only loading required textures
- Time to first pixel is greatly reduced
- Two new samples included to demonstrate best practices
Nsight Compute 2019.4 & NsightVSE 2019.3 Debugger OptiX application profiling support
- OptiX driver modules are identified
- All public OptiX modules and Application/User kernels called by OptiX are visible
- NsightVSE can set breakpoints, inspect GPU state, and debug with expected run control through application code

Download OptiX SDK 6.0

The much anticipated OptiX 6 SDK release brings a giant leap in performance. This new release lets developers take advantage of the new RT Cores in Turing GPUs. RT Cores accelerate Bounding Volume Hierarchy (BVH) traversal and ray/triangle intersection testing (ray casting) functions. This version also takes advantage of Tensor Cores present on Volta and Turing GPUs to accelerate the OptiX AI Denoiser. To download, you must be a member of NVIDIA Developer - DesignWorks.

Release Notes (PDF)

Note: For the OSX versions please use 5.1.2 (Power9) or 5.0.1(Mac OSX) available lower on this page

ChangeLog

Please see release notes for details

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OptiX 6.0.0 fully implements RTX acceleration including:
- Support for RT Cores on Turing RTX GPUs.
- Separate compilation of shaders for faster startup times and updates.
- RTX acceleration is supported on Maxwell and newer GPUs but require Turing GPUs for RT Core acceleration.
Multi-GPU support for scaling performance across GPUs, Mixing GPUs with RT Cores and without RT Cores is not supported.
Support for scaling texture memory across NVLink connected GPUs.
Triangle API with motion blur and attribute programs.
rtTrace from bindless callable programs.
Turing-specific optimizations for the OptiX AI denoiser.
Set the stack size by providing the Trace depth.
Take advantage of hardware-accelerated 8-bit mask.
General stability improvements.

Important Notes:

We recommend you use the optixGeometryTriangles examples to get started with the Triangle API
Minimum driver required is R418

Download OptiX SDK 5.1.2 for Power9 (v.5.1.2)

Download OptiX SDK 5.1.1

OptiX 5 SDK release is an important milestone in the evolution of OptiX, featuring built-in support for motion blur, and a deep-learning based denoiser. Version 5.0 maintains compatibility with your existing applications and provides the same easy to use API for which OptiX is known. To download, you must be a member of NVIDIA Developer - DesignWorks.

Release Notes (PDF)

Note: For the OSX versions please use 5.0.1 available in the OptiX Legacy Downloads

ChangeLog

Please see release notes for details

Fixed visible artifacts due to a bug in the tiling code
Fixed error when resizing denoiser window (-4711 error)
Fixed few issues that caused denoiser to use too much memory

Please note that the OptiX 5.1.1 SDK does not support Turing.

Download OptiX SDK 5.1

Release Notes (615KB, PDF)

ChangeLog

Build time improvements for scenes with many instances
Shader compile time improvements
Added disk caching for compiled shaders to improve start up time
Added HDR support for the OptiX AI-Accelerated Denoiser
Improved profiling and debugging by propagating source code line numbers to final binaries
New MDL sample demonstrating custom BSDFs

Download OptiX SDK 5.0.1

Release Notes (615KB, PDF)

ChangeLog

Fixes and enhancements to the AI denoiser integration
Fixed crash when using peer to peer access in WDDM mode
OptiX sample application improvements

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Download OptiX SDK 5.0

Release Notes (615KB, PDF)

ChangeLog

New AI-Accelerated Denoiser
Support for Volta class GPUs has been added.
Support for motion blur by enabling motion data for Transform and Geometry nodes
Improved startup time and general performance improvements
Two new samples demonstrate how the NVIDIA Material Definition Language (MDL) can be used with OptiX

Download OptiX SDK 4.1.1

OptiX 4 is also now free to use within any application, including commercial and educational applications. To download, you must be a member of NVIDIA Developer - DesignWorks.

Release Notes (615KB, PDF)

ChangeLog

Reduced host memory usage for scenes with large numbers of geometry instances.
Fixed a bug where the primitive index offset was ignored if a GeometryGroup only contained a single GeometryInstance.
Fixed a bug in Optix Prime where the least significant bit of the floating point hit distance could be nondeterministic for some triangles in a scene, depending on their location in the Bvh.
Changed all Optix Prime SDK samples to use CUDA context by default.
Fix for scene creation time when sharing Material across many GeometryInstances.
Fixed a memory leak on GL interop buffer destroy
Fixed an issue where the CUDA compute cache would sometimes not kick in, causing longer compile times.
Updated installer framework to avoid security problem at installation time of the SDK.

Download OptiX SDK 4.1.0

OptiX 4 is also now free to use within any application, including commercial and educational applications. To download, you must be a member of NVIDIA Developer - DesignWorks.

Release Notes (615KB, PDF)

ChangeLog

Support for CUDA 8.0
Support for Visual Studio 2015 when building the SDK
Various bug fixes, including more robust handling of complex node graph changes
Better kernel performance in some cases
The OptiX headers are now compatible with NVRTC, the runtime compilation library shipping with CUDA (read more)

Download OptiX SDK 4.0.3

OptiX 4 is also now free to use within any application, including commercial and educational applications.

Release Notes (615KB, PDF)

Changelog

Changed all Optix Prime SDK samples to use CUDA context by default.
Fixed a memory leak on GL interop buffer destroy
Updated installer framework to avoid security problem at installation time of the SDK.

Download OptiX SDK 4.0.2

OptiX 4 is also now free to use within any application, including commercial and educational applications.

Release Notes (615KB, PDF)

Changelog

New EULA, now permitting unfettered use of OptiX in commercial applications
[OptiX and Prime] Fixed several issues that could lead to failures when using TRBVH with large scenes
Fixed an issue that could lead to unnecessary BVH rebuilds when calling rtContextSetEntryPointCount or rtContextSetRayTypeCount without changing the value
Fixed an issue that could lead to compilation errors when using atomics of different types in a single program
Reduced the memory requirements for TRBVH
Improved robustness when using multiple OptiX contexts
[Prime] Fixed an issue where in some out-of-memory situations RT_ERROR_UNKNOWN would be returned instead of RTP_ERROR_MEMORY_ALLOCATION_FAILED

Download OptiX SDK 4.0.1

OptiX 4 is also now free to use within any application, including commercial and educational applications.

Release Notes (453KB, PDF)

Changelog

New EULA, now permitting unfettered use of OptiX in commercial applications
Fixed an “invalid device function” error when running on Pascal GPUs in some cases
Fixed an issue where certain modifications to the node graph could trigger an assertion
Fixed an issue with the CPU fallback of TRBVH
Fixed an issue that could lead to corrupt output when using 3D launches
Fixed a performance issue when using instancing in OptiX Prime on Windows
Improved compile times when OptiX exceptions are enabled
Improved various error messages
Added handling of half formats to rtuGetSizeForRTformat
Fixed the default buffer size in primeMultiBuffering sample

Download OptiX SDK 4.0.0

Release Notes (504KB, PDF)

Changelog

Support for Pascal class GPUs
Memory scaling across NVLINK. With multiple NVLINK-capable GPUs in the system, OptiX 4.0 is able toautomatically and transparently combine their memory, so applications can fit larger scenes.
Compiled kernels are now cached in memory, which helps avoid repeated recompiles.
Heterogeneous multi-GPU support. OptiX 4.0 can take advantage of multiple GPUs in a system even if they are notof the same architecture.
Improved error checking and validation.
rtBufferMapEx now implements all map modes, including RT_BUFFER_MAP_WRITE_DISCARD which helps avoidunnecessary device-to-host copies.
Streamlined the SDK samples by reducing their number, reducing code complexity, and increasing focus.
Improved performance with large node graphs.
Improved compile times.
Reduced host overhead for dynamic scenes.
Significant performance improvements for local progressive rendering.
CUDA interop improvements, including the ability to interop with both the Runtime and the Driver API.
Improved kernel runtime and compile time performance over 3.9 in many cases. Reduced host overheadcompared to 3.9 in most scenarios.
Support for Fermi class GPUs has been removed.
The following functions have been deprecated: rtAccelerationGetDataSize, rtAccelerationGetData,rtAccelerationSetData, rtAccelerationGetTraverser, rtAccelerationSetTraverser, rtBufferCreateForCUDA,rtContextCompile, rtGeometryIsDirty, rtGeometryMarkDirty.
Some acceleration structure builder mappings and properties have changed. Please refer to the referencedocumentation for details.
Support for automatic paging of data from system memory has been removed..
rtContextSetPrintBufferSize must be called before the first launch to take effect..
Stricter validation of user programs. Uninitialized variables in OptiX programs are not allowed, except float, int,uint, programID, and user types. Type checking is stricter. Writing to attributes outside of anrtPotentialIntersection/rtReportIntersection pair now causes an error.
Cancelling long running operations with rtContextSetTimeoutCallback is currently not implemented.
rtVariableGetAnnotation is currently not implemented and will return an empty string.
DirectX interop support has been removed.
The integer encoding of the OptiX version returned by rtGetVersion now includes an extra digit for minor andbugfix versions.
The rtBufferSetDevicePointer and rtBufferGetDevicePointer interfaces have been modified. Please refer to thereference documentation.
rtBufferGetGLBOId and rtTextureSamplerGetGLImageId now return RT_SUCCESS instead of RT_INVALID_VALUE (inaddition to setting the output ID to zero) when called on a non-GL buffer/sampler.

Download OptiX 3.9.2

Windows 7 and higher, 64bit (155MB, EXE)
Linux (279MB, SH)
Mac OSX 10.9 or higher (576MB, DMG)
Release Notes (504KB, PDF)

Changelog

Fixed an issue where certain node graph configurations could lead to internal errors being reported.
Fixed too high memory consumption in some cases when using TRBVH which could lead to out ofmemory errors for modestly large models.
Updated installer framework to avoid security problem at installation time of the SDK.

Download OptiX 3.9.1

Windows 7 and higher, 64bit (155MB, EXE)
Linux (279MB, SH)
Mac OSX 10.9 or higher (576MB, DMG)
Release Notes (504KB, PDF)

Changelog

Added support for Pascal GPU architectures.
Improved performance with large node graphs.
Improved compile times.
Reduced host overhead for dynamic scenes.
Many compiler bug fixes and robustness improvements.
Fixed an issue with buffer loads accessing different buffers based on a condition.
Fixed rtBufferGetPointer incorrectly interpreting its device number argument.
Fixed an issue with switching between non-triangle and triangle geometry for Trbvh accelerations.
Fixed an issue with mipped/cubed/layered textures.
Fixed an issue where using Trbvh could lead to missing geometry.
Fixed an issue where using Trbvh could lead to crashes.
Improved robustness to NaNs and Infs in geometry input for Trbvh.
Fixed a rare case of VCA server versions not being detected correctly.
Fixed trace captures with OpenGL half float textures.
Prime: Fixed an issue with handling very large scenes.

Download OptiX 3.9

Windows 7 and higher, 64bit (163MB, EXE)
Linux (303MB, SH)
Mac OSX 10.9 or higher (1009MB, DMG)
Release Notes (504KB, PDF)

Changelog

CUDA 7.5 Toolkit support.
Trbvh builds are now twice as fast in OptiX.
Faster ray tracing of massive models in both OptiX and OptiX Prime.
Access to new texture types available in CUDA 7.5 including MIP-mapped textures, cube textures, and layered textures via gather and fetch.
Support for anisotropic texture filtering.
Support for half float textures.
Reduced CPU overhead for very large node graphs.
Prime now supports a watertight ray-triangle intersection mode for improved robustness.
Added new dynamicGeometry sample that illustrates performance alternatives for rigid body motion with large node graphs.
OpenGL interop now supports GL_SRGB8 and GL_SRGB8_ALPHA8 modes.
Improvements to compile times up to 7x of very large user code when using R358 or later drivers on Maxwell GPUs.

Download OptiX 3.8

Windows 7 and higher, 64bit (112MB, EXE)
Linux (205MB, RUN)
Mac OSX 10.9 or higher (394MB, DMG)
Release Notes (500KB, PDF)

Changelog

VCA Support
Progressive API
Stream buffer API
CUDA 7.0 support
First class Trbvh support as default builder in OptiX samples

Download OptiX 3.7

Windows 7 and higher, 64bit (96MB, EXE)
Linux (186MB, RUN)
Mac OSX 10.9 or higher (329MB, DMG)
Release Notes (458KB, PDF)

Refit Osx

Changelog

Refit Osx Catalina

Instancing in OptiX Prime
Visual Studio 2013 support