Kdy a jak resetovat PRAM a SMC na Vašem Macu?

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Chová se váš Mac trochu divně? Disky se nezobrazují, máte problémy s Bluetooth, AirPort není připojen? Ventilátor běží neustále, i když počítač není extra vytížený, nebo baterie hlásí, že je nabitá na 50% a váš MacBook je přitom připojen k nabíječce. Všechny tyto podivnosti předvídají hardwarový problém. Dobrou zprávou je, že stisknutím pár tlačítek a restartováním počítače se věci (snad) vrátí zpět k normálu.

Co dočinění má s těmito problémy PRAM – parametr RAM, což je v podstatě malé množství paměti, která ukládá určitá nastavení tak, aby OS X  k nim mohl přistupovat rychle. Jedná se o záležitosti jako je nastavení myši, hlasitost reproduktoru, virtuální paměti, rozlišení obrazovky a jiných základních údajů.

V případě problému s jakoukoliv uvedenou položkou, proveďte resetování PRAM:

1. Vypněte svůj počítač.
2. Na klávesnici si najděte klávesy command + alt(option) + P + R
3. Zapněte počítač stisknutím tlačítka Power jako obvykle při zapnutí a okamžitě stiskněte klávesy command + alt + P + R. Ujistěte se, že tyto klávesnice jsou opravdu všechny stlačeny dříve než se objeví šedá obrazovka. Jinak to nebude fungovat.
4. Klávesy držte tak dlouho, dokud nezazní dvakrát spouštěcí zvuk znějící při startu Maca.
5. Nyní nechte načíst celý systém a poté restartujte počítač normálním způsobem.

Resetem PRAM neztratíte žádná data ani nastavení. Když se přihlásit zpět, budete muset pravděpodobně pouze přizpůsobit rychlost myši, čas a datum / časové pásmo a pár dalších věcí. Reset pomáhá vyřešit interní problémy počítače a zlepšuje stav a výkonnost baterie.

 

Resetování řadiče pro správu systému (SMC) na Macu

Společník k PRAM je SMC (system management controller ). Nastavení související s napájením se na Macu uchovávají v řadiči pro správu systému (SMC). Máte-li problém s napájením počítače, případně se spánkem, probouzením a nabíjením notebooku Mac nebo jinými funkcemi souvisejícími s napájením, budete muset resetovat SMC.

Některé další smyptomy předvídající potřebu resetování SMC:

• Ventilátory Maca jedou na plné obrátky, i když ho výrazně nezatěžujete
• špatné fungování podsvícení klávesnice, pokud Mac má
• špatné fungování stavové kontrolky
• špatné nabíjení baterie
• při otevírání aplikací poskakují ikony v Docku příliš dlouho

Před resetováním nejprve zjistěte, jestli máte notebook s vyjímatelnou nebo nevyjímatelnou baterii. Nevyjímatelné baterie mají MacBook Pro (začátek roku 2009) a novější, všechny modely MacBooku Air, MacBook (konec roku 2009) a MacBook (Retina, 12palcový, začátek roku 2015).  Pokud Váš Mac má baterie nevyjímatelnou, postupujte následovně

1. Vypněte svůj počítač.
2. Připojte ho k napájecímu adaptéru MagSafe a nechte ho nabíjet.
3. Současně stiskněte na levé části klávesnice klávesy shift + control + alt  a k tomu stiskněte klávesu pro zapnutí Macu
4. Všechny klávesy z bodu 3. držte stisknuté dvě až tři sekundy a pak je najednou uvolněte.
5. Obvyklým způsobem zapněte Mac.

Pokud je baterie vyjímatelná, postupujte takto:

1. Vypněte svůj počítač.
2. Odpojte od Macu nabíječku.
3. Vyndejte baterii.
4. Poté pět vteřin držte stisknuté tlačítko pro zapnutí počítače.
5. Vraťte baterii zpět a připojte nabíječku MagSafe.
6. Obvyklým způsobem zapněte Mac.