SSDReporter tracks SSD lifetime by observing the health attributes #202, #226, #230, #231 and #233. Most recent SSDs support at least one of these attributes. Sadly some of Apple's own SSDs do not include these important health attributes. In this case SSDReporter falls back to using the also-valuable attributes #5 and #173. If only attribute #5 is supported you'll see '{low-accuracy!}' appended to the SSD status information to signify that the health information is inaccurate. If your SSD supports none of these 7 attributes, it is not supported by SSDReporter.