Macs Fan Control is a free app from CrystalIdea Software Inc. for better control over Mac cooling fans, letting you set individual fans to a constant speed or control them in relation to a specific temperature sensor, from built-in Apple sensors to third-party hard drive and SSD SMART data. You can set minimum and maximum thresholds, display thermal sensor data, display a temperature and fan speed in the Mac menubar, and even use it with Windows running in Boot Camp.
Macs Fan Control 1.5.4 is a free download for macOS 10.12 and up with earlier versions available for Mac OS X 10.6 to OS X 10.11. A $14.95 “Pro” version brings custom fan presets, plus “priority customer support and confidence in future updates and improvements.” The latest release “now works in Windows 10 also on modern computers that have the T2 security chip.“
Trim Enabler is a Mac app from Oskar Groth (Cindori Software AB) that enables SSD Trim for better performance and longevity with solid-state drives. (Apple supports Trim for its own internal flash storage in modern Macs but doesn’t support third-party Trim without special overrides.) Features include Trim on/off switching, other optimization controls (Sudden Motion Sensor, Local Time Machine, Sleep Image, and Access Time logging), SMART-based information about drive health (with the option of installing a SMART driver for external drives), and a benchmarking utility.
Trim Enabler 4.1.3 is priced at $14.99 for OS X 10.9 and up, with a 14-day trial period and older versions available with support for earlier Macs. The latest version brings full support for macOS 10.14 and 10.15.
Sensei is a pending product for macOS Catalina that expands on the company’s previous Disk Sensei app (a more advanced alternative to Trim Enabler with a number of additional capabilities).
DriveDx is a hard drive and SSD diagnostic and monitoring utility from BinaryFruit. Features include monitoring of SMART data, temperature and free space with thresholds and algorithms for predicting problems, logging of data over time, email notifications of status updates, the ability to trigger self-tests, save detailed drive health reports, and more. Among other tidbits, the app provides details on sector size, which can play into compatibility issues. (External FireWire/USB monitoring is provided via the third-party SAT SMART Driver for devices that support SMART data transfer.)
DriveDx 1.9.0 is priced at $19.99 for an individual license for Mac OS X 10.6 and up with a 10-day trial period. (A $39.99 Family license supports 5 computers in a household.) The latest release brings support for a raft of new SSDs, among other updates.