I just got back from Yosemite and found the snow conditions for the High Country to be incompatible for current hiking unless you're experienced with route finding and snow hiking. I checked out the trail conditions for Cathedral Lakes, Ten Lakes, Young Lakes and Clouds Rest. Postholing began quickly on all the hikes except Young Lakes and Ten Lakes, where I was able to go about 1.5 miles until the snow made route finding capabilities mandatory.
I have been coming to Yosemite to hike an average of 60 days a year since 1984. I have not seen snow conditions like this in YEARS.
However, Four Mile Trail, Nevada Falls and the trails in the Valley are free of snow and doable.