
Previous versions of TechTool Pro and their supported macOS versions
Below is a list of prior versions of Techtool Pro and their supported version of the Mac operating systems (macOS) TechTool Pro 20 – Released […]

Below is a list of prior versions of Techtool Pro and their supported version of the Mac operating systems (macOS) TechTool Pro 20 – Released […]

Reading SMART attributes from external drives connected via USB or FireWire requires that you install the SAT SMART Driver extension so your Mac can ‘see’ […]

Macs released over the past decade use a new internal storage connection called NVMe (nonvolatile memory express) or PCI-Express for their internal SSDs. To ensure […]

There is a known issue with solid state drives (SSDs) produced by Toshiba for certain MacBook Air models. Specifically, SSDs with the model numbers APPLE SSD […]

Drive Scope can only initiate the self-testing process, which is managed internally by the drive itself. If the drive’s internal testing mechanism detects an error […]

The current SAT SMART Driver extension used to access health data on external drives has limitations in macOS 11 ‘Big Sur’. If your Mac supports […]

Techtool Pro, Lifespan and Drive Scope require a third party extension, the SAT SMART Driver extension, to display health data from an external USB (or […]

TechTool Pro 18.1.1 and later fully support macOS 14 ‘Sonoma’. Earlier versions, such as TechTool Pro 18.0.3 and below, are not fully compatible with this […]

Starting with macOS 10.13 ‘High Sierra’, Apple completely removed all of this functionality from the Mac operating system, making it impossible to perform disk permissions […]

Techtool Pro 18 introduced the Security Check tool, which reviews a number of potential security vulnerabilities on your Mac. This article covers how to keep […]