Do you mean that Lightroom crashes and you are back in your operating system; or do you mean that the entire computer shuts down?
Hello and thanks for the reply.
The entire computer shuts down and will not restart without a reset of the new (and previous) surge protector or if plugged directly to the wall receptacle anywhere from 30 minute to overnight reset before on button restart will work. Other than slider adjustments on LR, it has only shut down one other time when loading photos via USB 3.0 cable to LR. All images from camera are in RAW. Apple tried to replicate this earlier this week with LR but could not read anything other than an increased usage on one of the diagnostic meters when the sliders were moved quickly from side to side.
Other computer functions are normal and rarely used except for e-mail, web search, and 90% LR. Plenty of memory in reserve.
Considering two upgrades (1) LR 5 to get new camera profiles (Pentax K-3)
(2)Yosemite OSX if it would help the LR4.4 or LR5 actually behave
Hope this helps illustrate the dilemma and thanks for your support.
If you can't restart your computer for a long time, then most likely some part of your computer has overheated and has to cool down.
When the computer shuts down, this is almost always a hardware problem (or a driver problem, but the inability to restart for a while rules that out)
Thanks dj. I'll take it back to Apple and leave it until they get it right (the sixth time, as its under warranty) Any other suggestions anyone?
Well as you surmised dj, Power Supply, 300w under warranty. Thanks for the assistance.