mac os x el capitan installation: this copy of the install os x el capitan application cannot be verified

problem zaman senkronizasyonundan kaynaklanıyor.

çözüm:

open utilities -> terminal

ntpdate -u 194.27.222.5

OS X El Capitan: otomatik metin duzeltme ozelliginin kapatilmasi

1. Open System Preferences from the  Apple menu as usual, then go to “Keyboard”
2. Choose the “Text” tab
3. Uncheck the box next to “Correct spelling automatically”