No Audio After Sleep/Wake - Realtek ALC AppleHDA [Fixes] No onboard audio after wake occurs on some systems with 10.10 and newer and since 10.9.2 and newer. The problem was introduced in 10.9.2, ironically, when Apple tried to "fix" no audio after wake on native hardware (more information, see Details). For users that believe codec patching causes the problem, the patches do not modify a single line of code. Instead, the patches configure the codec to support AppleHDA requirements. The specific AppleHDA codec engine enabled is no longer actively supported and, at some point, may be removed. Resolution of this problem is not likely. Note: Posts to this thread are limited to additional "no audio after wake" fixes. New fixes are added to this post upon verification. Posts describing the problem, requesting help or simply complaining will be removed. Details Mavericks: No Audio - Realtek ALC AppleHDA [Guide] - Page 73 credit: TimeWalker75a #721 Fixes - install one fix; if the fix does not work, remove and try another EAPD-Codec-Commander credit: the-darkvoid, RehabMan No sound after sleep - ALC892 - Yosemite + Clover, Post #17/#19 Repo:RehabMan / OS-X-EAPD-Codec-Commander Download: RehabMan / OS-X-EAPD-Codec-Commander 1150 only: Fix no sound after sleep on 1150 credit: tigersoul925 Dolnor/EAPD-Codec-Commander credit: TimeWalker75a #20, No sound after waking from sleep set boot flag: darkwake=8 Installation example, credit: Rickmywirry, Post #4 No sound after sleep - ALC892 - Yosemite + Clover Releases · cliffom/appleHDAReset · GitHub credit: cliffom #92, Realtek ALC 892 No sound after sleep [10.9.2] No OnBoard Audio After Wake From Sleep? credit: shilohh Working sysdef, try imac14,2, credit: photo-bit, #44 imac13,2, credit: kiu77 #54 AppleHDA prior to Apple "fix" (select one method) Install patched AppleHDA Mavericks 10.9.1/AppleHDA.kext_v2.5.3/MultiBeast 6.1.0 Downloads - tonymacx86.com Mavericks 10.9/AppleHDA.kext_v2.5.2/MultiBeast 6.0.1 Downloads - tonymacx86.com Install native AppleHDA (10.9 or 10.9.1) Realtek ALC AppleHDA Patch in place Clover patch Onboard audio substitutes USB HDMI PCIe Problem Reporting (posts describing problems may be removed) No support, contact developers noted above.