Apple Imac 21 5inch Late 2011 User Guide

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Boost Your Memory
3  

32Chapter 3      Boost Your Memory
Your	iMac	comes	with	at	least	2	gigabytes	(GB)	of	Double	Data	Rate	3	(DDR3)	Dynamic	
Random	Access	memory	(DRAM)	installed	as	one	2	GB	memory	module. 	You	can	
replace	or	install	additional	2	GB	or	4	GB	memory	modules	for	up	to	a	maximum	of		
8	GB. 	Memory	modules	must	meet	the	following	specifications:
	
ÂSmall	Outline	Dual	Inline	Memory	Module	(SO-DIMM)	format
	
Â1333	MHz, 	PC3-10600, 	DDR3	compliant	(also	referred	to	as	DDR3	1333)
	
ÂUnbuffered	and	unregistered...

33
Chapter 3      Boost Your Memory
Installing Memory
Your	iMac	has	four	memory	slots. 	One	is	filled	with	at	least	a	2	GB	memory	module. 	You	
can	install	additional	memory	in	the	free	slots	or	replace	the	memory	in	the	filled	slot	
with	2	GB	or	4	GB	memory	modules, 	for	up	to	8	GB	of	memory.
You	can	purchase	additional	Apple	memory	from	an	Apple	Authorized	Reseller, 	
an	Apple	Retail	Store, 	or	the	Apple	Online	Store	at	www.apple.com/store.
WARNING: Always	shut	down	your	iMac	and	remove	the	power	cord...

34Chapter 3      Boost Your Memory
4 Raise	the	stand	and	use	a	Phillips	#2	screwdriver	to	loosen	the	three	captive	screws	on	
the	memory	access	door .	 Turn	them	counterclockwise.
Phillips
screwdriver
Raise
stand
Memory
access
door
®
5  Remove	the	memory	access	door	and	set	it	aside. 

35
Chapter 3      Boost Your Memory
6 Untuck	the	tabs	in	the	memory	compartment. 	
7  To	replace	memory	modules, 	pull	the	tab	to	eject	the	installed	memory	module. 	
Remove	the	memory	modules	you	want	to	replace.
®
Untuck the tabs
Pull the tab 

36Chapter 3      Boost Your Memory
8 Insert	the	new	memory	modules	in	the	slots	with	the	notches	facing	right, 	as	shown	in	
the	illustration. 	
	
ÂIf	you	install	additional	memory	modules, 	insert	them	in	the	open	slots.
	
ÂIf	you	replace	the	installed	memory	modules, 	insert	a	new	memory	module	in	each	
of	the	slots	farthest	from	the	display. 	
9  Press	each	memory	module	firmly	and	evenly	into	its	slot. 	You’ll	hear	a	slight	click	when	
the	memory	module	is	seated	correctly.
10  Tuck	the	tabs	into	the...

37
Chapter 3      Boost Your Memory
11 Replace	the	memory	access	door	and	tighten	the	three	captive	screws	with	a		
Phillips	#2	screwdriver.
WARNING:  Remember	to	replace	the	memory	access	door	after	you	install	memory. 	
Your	iMac	won’t	function	properly	without	the	memory	access	door.
Phillips
screwdriver
Raise
stand
Memory
access
door
®
12  Hold	your	iMac	by	its	sides	and	return	it	to	a	standing	position. 	Then	reconnect	the	
cables	and	power	cord.
13  Press	the	power	button	(®)	on	the	back	of	your...

38Chapter 3      Boost Your Memory
Making Sure Your iMac Recognizes the New Memory
After	installing	memory, 	make	sure	your	iMac	recognizes	the	new	memory. 	
To check the memory installed in your iMac:
1  Start	up	your	iMac.
2  When	you	see	the	Mac	OS	X	desktop, 	choose	Apple	()	>	About	This	Mac.
You’ll	see	the	total	amount	of	memory	installed	in	your	iMac. 	For	a	detailed	view	of	the	
amount	of	memory	installed, 	open	System	Information	by	clicking	More	Info	and	then	
click	Memory.
If	the	memory	you...

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Problem, Meet Solution
4  

40Chapter 4      Problem, Meet Solution
Occasionally	you	may	have	problems	while	working	with	your	iMac. 	Read	on	for	
troubleshooting	tips	to	try	when	you	have	a	problem. 	You	can	also	find	more	
troubleshooting	information	in	Help	Center	and	on	the	iMac	Support	website	at	
www.apple.com/support/imac.
If	you	experience	a	problem	working	with	your	iMac, 	there’s	usually	a	simple	and	quick	
solution. 	If	you	encounter	a	problem, 	try	to	make	a	note	of	what	you	did	before	the	
problem	occurred. 	This	can...