Sunday - July 26 - Update.
The north crane on the office tower finally finished up working at 8:10 this evening - a 13 hour or so day. Everything was proceeding normally until between 5:30 and 6 PM, when the crane appeared to be stuck in a stationary position, with the boom pointing towards the south portion of the building, in an almost horizontal position. Around 7 PM, a couple of workers could be seen at the mechanical equipment section of the crane, in front of the counterweights. By 7:10 the crane was working again, and continued to be active until it shut down at 8:10.
Walked along Wellington Street towards Spadina to try and see what may have been causing the problem, but it was resolved and the crane was operating again before getting close enough to see much,.
One thing that was noticed, not aware of previously, was that the office tower north crane is now going up outside the building, sitting on top of the roof slab where the setback is on the east side, and has the side bracing holding it in place - similar to the cranes at the L Tower and CIBC Square.
Three photos - the first is from around 6:30 PM, showing the crane in the position where it appeared to be stuck for about one and a half hours. The second two pictures show the base of the north crane, with the frame containing the jacks to lift the upper part for installation of the additional mast sections.