Enormously disappointed in the new Sierra version of TechTool Pro app when it comes to creating a TechTool Protogo (Pro-to-go) startup & diagnostic tool on a USB stick.
Previously I had a version of the Protogo drive made with Yosemite. This was reasonably effective, started quickly & ran quickly enough except it wasn't for use with Macs with Sierra installed as the version of TTP on the Protogo drive wasn't Sierra-compatible.
The new Protogo drive made with Sierra & using the new Sierra-compliant version of TTP is slow to the point of uselessness. I installed it on the same 16 GB USB 2.0 drive as the previous version.
The Protogo drive incorporates Safari, System Preferences, Preview, TextEdit, Disk Utility, TechTool Pro, Console, Activity Monitor & Terminal apps with a basic startup version of whichever Mac OS version you happen to be booted into when creating the Protogo drive in the first place.
I found that apps were impossibly slow to open and for some ungodly reason the 16 GB drive included a 4.29 GB sleepimage. This is odd because the correspond ing sleepimage on the Mac that created the Protogo drive is only 1.07 GB.
Tomorrow I'll reboot from the Yosemite external SSD & run TechTool Pro from the Mac's internal drive. Then I'll recreate the Protogo drive using the Sierra-compliant TTP app but with a Yosemite OS.
It's approaching 9:30 pm on an uncomfortably hot night and I just can't be bothered trying to fix the fucker today.