Description:
Mac 10.9: Brackets Helper process Not Responding 15-20 seconds after launch in Activity Monitor. Shows up in red text in Activity Monitor. The same thing happens with Google Chrome on Mac 10.9, so this is a tracking bug. According to Peter Flynn, it's the GPU helper. We checked the Chrome process ID that was not responding > opened Chrome's task manager (hamburger icon > Tools > Task Manager) > mapped not responding process ID from Activity Monitor to process ID in Chrome Task Manager > GPU Process. Here is the Chromium bug for this issue:

Issue 304860: Mavericks: Helper processes shown in Activity Monitor as "Not Responding"
https://code.google.com/p/chromium/issues/detail?id=304860

Repro on Mac 10.9 using Brackets Sprint 33 10188 GM, Sprint 32 9791 GM, Sprint 31 9569 GM. UTR on Mac 10.8 using BK Sprint 33 GM 10188.

Repro steps:

1. Install Brackets on Mac 10.9.
2. Launch Activity Monitor.
3. Launch Brackets.
4. Watch Activity Monitor for ~15-20 seconds.

Actual results:
Activity Monitor says Brackets Helper process is not responding.

Expected results:
Brackets Helper is responding.

Workaround:
None. Everything seems to be working fine, so it appears this is a false positive. Comment from Chromium bug: "This is an issue with how Activity Monitor determines responsiveness – these processes are running perfectly fine. (We changed chrome to work around that Activity Monitor issue, and the fix will reach you eventually, depending on which channel you use, how far we merge this, etc.)"