I knew that when running from the stock 7.6.1 on the HD, Type 1 crashes were extremely rare (if indeed they happened at all… i don’t remember). It occurred to me to try copying the OS 7.6.1 off the CD-ROM onto my IIsi’s internal hard drive (hereinafter HD), to see if the crashes would still happen.

It sometimes seemed difficult to do anything running under 7.6.1. Running from OS 7.5.5 on the CD rarely crashed, and when it did, the crashes were usually not Type 1. I had long know that the problem only occurs when the computer is running from the Mac OS 7.6.1 on the CD. Having become annoyed at this situation during March 2005 testing for an update to this review, i decided to take the time to look deeper into the problem. Sonic’s TechTool Pro CD-ROM Fix Type 1 Crash Fix History & The SituationĪs discussed in the individual reviews for TechTool Pro versions 2 and 3, Type 1 crashes when booted from the TTP CD-ROM have been very frequent, esp.