Sine Wave Input for Op Amp Integrator but Output Looks Weird
The -1V initial transient comes from allowing the DC solution to establish the starting condition, the cap is charged up by the source being at +1V due to being at +90 degrees phase, once the simulation starts the op-amp forces the input to its virtual earth condition by stepping the output down.
  If you set the phase to 0 this won't happen, but equally, if you set "skip initial operating point solution" it will start up with the cap uncharged.  The ".ic" directive becomes irrelevant then.



The output signal is still invisible, since it is scaled to the input amplitude.