Thief has snuck stealthily onto Mac OS X, ported by Feral Interactive.

Loot the informative documents from the Mac version minisite then find Thief: Master Thief Edition stashed here on Steam with the additional bounty of a mini digital art book, comic book and soundtrack. Playable DLC is available separately.

The system requirements are:

MINIMUM:
OS: Mac OS X 10.10.5
Processor: 1.8 GHz Intel
RAM: 4GB
Hard Disk: 35GB
Graphics: 1GB
Input: Keyboard & Mouse

RECOMMENDED:
OS: Mac OS X 10.11.1 or higher
Processor: 2.4 GHz Intel
RAM: 8GB
Hard Disk: 45GB
Graphics: 2GB
Input: Gamepad

The following graphics cards are not supported: AMD Radeon HD 4xxx series, ATI X1xxx series, ATI HD2xxx series, Intel Iris 5100, Intel HD5000, Intel Iris 6100, Intel HD6000, Intel HD5300, Intel GMA series, Intel HD3000, Intel HD4000, NVIDIA 1xx series, NVIDIA 9xxx series, NVIDIA 8xxx series, NVIDIA 7xxx series and NVIDIA 3xx series.

This game is not currently supported on volumes formatted as Case-sensitive.

Thief has snuck stealthily onto Mac OS X, ported by Feral Interactive.

Loot the informative documents from the Mac version minisite then find Thief: Master Thief Edition stashed here on Steam with the additional bounty of a mini digital art book, comic book and soundtrack. Playable DLC is available separately.

The system requirements are:

MINIMUM:
OS: Mac OS X 10.10.5
Processor: 1.8 GHz Intel
RAM: 4GB
Hard Disk: 35GB
Graphics: 1GB
Input: Keyboard & Mouse

RECOMMENDED:
OS: Mac OS X 10.11.1 or higher
Processor: 2.4 GHz Intel
RAM: 8GB
Hard Disk: 45GB
Graphics: 2GB
Input: Gamepad

The following graphics cards are not supported: AMD Radeon HD 4xxx series, ATI X1xxx series, ATI HD2xxx series, Intel Iris 5100, Intel HD5000, Intel Iris 6100, Intel HD6000, Intel HD5300, Intel GMA series, Intel HD3000, Intel HD4000, NVIDIA 1xx series, NVIDIA 9xxx series, NVIDIA 8xxx series, NVIDIA 7xxx series and NVIDIA 3xx series.

This game is not currently supported on volumes formatted as Case-sensitive.

#Discussions_QuoteBlock_Author

Hello everyone,

We have just made public a new version of the PC version of Thief, v1.7 build 4158.21 This patch will be applied by Steam automatically when you next start the game. If your game does not update, please restart the Steam client.

This patch will address the following issues.
Made several AMD Mantle specific optimizations.
Fixed several issues with AMD Mantle and specific hardware configurations.

While we expect this patch to be an improvement for everyone, if you do have trouble with this patch and prefer to stay on the old version we made a Beta available on Steam, v1.6 build 4158.14, that can be used to switch back to the previous version

Step 1: Go to your STEAM library and select Thief in your game list
Step 2: right-click on the game and go to properties
Step 3: go to the Betas tab in the properties menu
Step 4: select version_1.6 and press ok.

This will set you back to the original released version of the game.
We will keep monitoring for feedback and will release further patches as it seems required. We always welcome your feedback!

#Discussions_QuoteBlock_Author

Hello everyone,

We have just made public a new version of the PC version of Thief, v1.7 build 4158.21 This patch will be applied by Steam automatically when you next start the game. If your game does not update, please restart the Steam client.

This patch will address the following issues.
Made several AMD Mantle specific optimizations.
Fixed several issues with AMD Mantle and specific hardware configurations.

While we expect this patch to be an improvement for everyone, if you do have trouble with this patch and prefer to stay on the old version we made a Beta available on Steam, v1.6 build 4158.14, that can be used to switch back to the previous version

Step 1: Go to your STEAM library and select Thief in your game list
Step 2: right-click on the game and go to properties
Step 3: go to the Betas tab in the properties menu
Step 4: select version_1.6 and press ok.

This will set you back to the original released version of the game.
We will keep monitoring for feedback and will release further patches as it seems required. We always welcome your feedback!

You just got home clutching your hot new copy of THIEF in your greedy paws, lights are dimmed, snacks are on hand, you're all ready to play and... GRAR. Technical problem. Nothing more frustrating. But there's help! We'll be compiling known issues and solutions and updating this page regularly to make sure your thieving goes as smoothly as possible.

Check out the below link for the latest FAQ

http://community.eidosmontreal.com/blogs/Thief-Tech-Support?theme=thief