I am having similar problems. I thought I had it figured out quickly, I'm finding out it wasn't so easy.
Here's my hardware:
- MACBOOK i7 2012 OSX (10.9)
-ATV 1080 WIFI -3rd Gen 2012
-HP i7 Windows 7
WHEN USING WIFI:
-When I airstream or homeshare iTunes on the PC, it is SEAMLESS. Movies. Music. Quick. FAST.
-When I use Macbook w/ WIFI, it BOGGS SLOW. Barely, or does NOT load movies. Choppy music at best. Screen freezes during airplay or mirrored desktop.
I pulled up the Network diagnostics on my Macbook, and basically iTunes is sputtering out the data. Then it crashes. When using WIFI with the Mac/iTunes to the ATV, that is where my problem lies.
SO---
I plug in the ethernet cord to the ATV and BAMMM .. the Macbook streams FLAWLESSLY, everything works great. I look at the Net Diag on the MAC and it's flowing like water, just like the PC does over the WIFI w/ Itunes just fine.
When the ethernet cable is plugged in, I can see both MAC and PC's Homeshared files, and I can go back and forth between them, changing nothing. Seems like everything works great. (so far) (said that before)
When I switch to WIFI, basically only the PC will airstream movies and homeshare with the ATV.
CRAZY, RIGHT? Why the **** would the PC work faster/more stable? It has to be something with iTunes on the Mac? Or something about Mac OSX? I would blame it all on the iTunes, but the MAC wont desktop mirror (which isn't in iTunes) correctly over WIFI either! So it must be something to do with the OS X. I had Mountain Lion, and that wasn't working at all. Now I am using the most updated version of Maverick to date.
-I am using Windows 7 (seamlessly) on PC
-on Macbook I'm using Maverick. updated. 10.9
-iTunes is updated to date on both mac and pc.
-ATV 3rd Gen is updated current software.
-I have tried all the easy fixes I can think of. Resetting ATV/PC/MAC/router/itunes
-I have no antivirus running on the MAC.
-Ironically I have one antivirus running on PC, but that works great.
I have tried using ONLY PC, and ONLY Mac, one at a time, with the other completely powered off. Reset all hardware and software, and still get same result. One time when the PC had been off and Mac had been running in background it was able to load one movie after sitting there for awhile. But I can start up PC and it SNAPS to the movie, or airstream QUICKLY.
AND, when Ethernet is plugged in, the ATV is FAST AND RESPONSIVE and streams/homeshares/mirrors perfectly on both machines at the same time.
Once again. I think this is somehow an issue with either the i7 Macbook Pro or with OS X. ONLY when using the WIFI. Is there some setting I can change? Or a fix? I am relatively new to Macs, and still could be overlooking something simple.
H-E-L-P Please!