DDDDDRMix Mac OS

DDDDDRMix Mac OS

May 29 2021

DDDDDRMix Mac OS

  1. Dddddrmix Mac Os 11
  2. Dddddrmix Mac Os Download
  3. Dddddrmix Mac Os X
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Mac OS X Mavericks (10.9) or later; Xcode; Installation. Hint - The official packages performs these steps automatically. Alternatively, you can install DMD in your user directory with the install script. Put the dmd zip file into your home directory, and unzip it: unzip dmd. I didn't find anything interesting except this document and I don't have access to Mac Developer Program. My guess would be that OS X supports exactly the same MDM protocol only with more limited configuration profiles/restrictions. – Victor Ronin Feb 15 '13 at 15:02. Manually installed configuration profiles for Mac computers can be removed using the profiles command-line tool, or System Preferences if the user knows an administrator’s user name and password. As of macOS 10.15, like on iOS and iPadOS, profiles installed with MDM must be removed with MDM, or they are removed automatically upon.

Kernel DMA Protection, (also known as Memory Access Protection, is a feature of a Windows 10 Secured-core PC that is supported on Intel and AMD platforms starting with Windows 10, version 1803 and Windows 10, version 1809.

With this feature, the OS and the system firmware protect the system against malicious and unintended Direct Memory Access (DMA) attacks for all DMA-capable devices:

  • During the boot process.
  • Against malicious DMA by devices connected to easily accessible internal/external DMA-capable ports, such as M.2 PCIe slots and Thunderbolt™3, during OS runtime.
Platform requirementDetails
64-bit CPUKernel DMA Protection is only supported on 64-bit IA processors with virtualization extensions, including Intel VT-X and AMD-v.
IOMMU (Intel VT-D, AMD-Vi)All I/O devices capable of DMA must be behind an enabled (by default) IOMMU. The IOMMU is used block/unblock devices based on DMAGuard Device Enumeration Policy, and perform DMA remapping for devices with compatible drivers.
PCI Express Native Control SupportEnabling PCI Express Native Control using _OSC ACPI method is required for Kernel DMA Protection support.
Pre-boot DMA Protection
  • System firmware must protect against pre-boot DMA attacks by implementing DMA isolation of all DMA capable devices' IO buffers pre-ExitBootServices().
  • System firmware must disable the Bus Master Enable (BME) bit for all PCI root ports, that do not have children devices required to perform DMA between ExitBootServices() and the device driver being started by the OS.
  • At ExitBootServices(), the IOMMU must be restored by system firmware to power ON state.
  • No device may perform DMA outside of RMRR regions (Intel) or IVMD blocks (AMD) after ExitBootServices() until the devices’ respective OS drivers are loaded and started by PnP.
    • Performing DMA outside of RMRR regions or IVMD blocks after ExitBootServices() and prior to the device driver start by the OS will result in an IOMMU fault and potentially a system bug check (0xE6).
ACPI Kernel DMA Protection Indicators
  • System firmware must set appropriate flags in ACPI tables to opt into and enable Kernel DMA Protection in OS:
    • For Intel platforms, system firmware must set 'DMA_CTRL_PLATFORM_OPT_IN_FLAG' in DMAR table flags field (Intel Virtualization Technology for Direct I/O Spec, Rev 2.5 Section 8.1).
    • For AMD platforms, system firmware must set 'DMA remap support” bit in the IVRS IVinfo field (AMD IOMMU Specification Rev 3.05, Section 5.2.1).
  • System firmware must tag the PCI ports that require OS runtime DMA protection with the appropriate ACPI _DSD flags:
    • Identifying externally exposed PCIe Root Ports.
    • Identifying internal PCIe ports accessible to users and requiring DMA protection.
  • For Intel platforms, DMAR tables must not include ACPI Namespace Device Descriptors (ANDD) structures.
Trusted Platform Module (TPM) 2.0TPMs, either discrete or firmware, will suffice. For more information, see Trusted Platform Module (TPM) 2.0.
  • On every boot where the IOMMU (VT-D or AMD-Vi) or Kernel DMA Protection are disabled, will be disabled, or configured to a lower security state, the platform MUST extend an EV_EFI_ACTION event into PCR[7] before enabling DMA.
  • The event string SHALL be “DMA Protection Disabled”. The platform firmware MUST log this measurement in the event log using the string “DMA Protection Disabled” for the Event Data.

Verifying Kernel DMA Protection state on a Windows 10 system

The state of Kernel DMA Protection can be verified on a given system using either of the following methods

  1. Using System Information application:

    • Launch MSINFO32.exe.
    • Check 'Kernel DMA Protection' field in the 'System Summary' page.
  2. Using Windows Security application:

    • Launch Windows Security application from the Windows Start menu.

    • Click on the “Device Security” icon.

    • Click on “Core isolation details”.

    • “Memory Access Protection” will be listed as an available Security Feature, if enabled.

      • If “Memory Access Protection” is not listed, then the feature is not enabled on the system.

Related topics

Dddddrmix Mac Os 11

While newer versions of dd on Ubuntu or the like come with a new option called status=progress, the one included with macOS sadly does not.

A nice way I found to get progress indication whilst still being able to benefit from the huge speed increase in using /dev/rdiskX is to install a tool called pv, also known as Pipe Viewer.

Now, split up your dd command into two, and pipe everything through pv. If you know the size of the input drive, provide that to pv as-well as it will further improve the output. Take this example, where my input drive is 64GB:

This will result in a familiar looking progress indicator, as-well as an ETA and transfer speeds.

This method also works very well when zeroing out drives, something I had to do quite a lot recently as I was preparing to sell off some older drives. Using the following command for a 500GB drive, for example, worked great:

It's quite useful to finally have some insight into how far along a task like this is, as it's usually quite a time consuming one.

Another way to achieve something similar would be to use brew to install coreutils, which will come with a newer version of dd that supports the status option.

Dddddrmix Mac Os Download

All tools installed with this package are named with g prefixed to them, so you can run gdd to use this packages' version of dd.

Sadly, this version of dd lacks support for macOS' 'raw' disk support (/dev/rdiskX), which means it will be significantly slower to copy a disk over, but there might be certain scenarios where this method is preferred.

Dddddrmix Mac Os X

I hope this helps!

Thanks.

DDDDDRMix Mac OS