Memory normally refers to RAM. Temporary, high-speed storage used to keep frequently accessed information available for use and helps keep the computer running smoothly

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1answer
3k views

Why do Mac OS X ramdisks appear to be limited to 550mb and how can I change this?

All I can find on the Internet is a one line bash command to activate a ramdisk. It is only 550mb and I would like to be able to create on with more space? Is there a way to configure how big they can ...
3
votes
2answers
908 views

Is it necessary to disconnect the battery when installing new RAM in the early 2011 MacBook Pro?

I want to install additional RAM to my early 2011 MacBook Pro. I originally was only looking at the official Apple guide, but then while searching for a better screwdriver I found the iFixit guide, ...
4
votes
1answer
5k views

Does the “purge” command damage any thing in my system?

I am using OS X 10.5.8 and in spite of having 5GB of RAM memory, I face a lot of inactive RAM, and go to the terminal and purge it via the "purge" command (of course without quotes). I do this almost ...
27
votes
2answers
7k views

Does the new Macbook Pro with Retina display have user-upgradeable RAM?

I'm interested in purchasing the new MacBook Pro with Retina display, but it's not clear from the tech specs page whether the RAM is user-upgradeable or not. Do I need to take into account future RAM ...
6
votes
4answers
50k views

Can I use 1333 MHz RAM in a 1067 MHz MacBook Pro?

I've got a MacBook Pro from mid 2010 (6,2) and there is 2GB DDR3 RAM at 1067 MHz installed. I want to upgrade to 8GB but with 1333MHz as speed. Is this possible? Can my Mac support this kind of speed ...
5
votes
2answers
6k views

When will Finder use large amount of memory?

Sometimes I see the iMac with 4GB of RAM having a few MB of swap file only, and after I left for a few hours and come back, the swap file is 2.7GB. Looking into the Activities Monitor, the Finder is ...
2
votes
2answers
8k views

Can I use 16 GB RAM with my MacBook Pro 7,1?

I just picked up 16GB of RAM for my MacBook Pro, running the newest OS X. According to the NewEgg reviews, it should work in it. However, once I boot up, it shows the Apple logo and, after a few ...
8
votes
1answer
4k views

Why is it that my Mac would rather swap than clear inactive memory?

Why is it that my Mac (running 10.8 Mountain Lion) would rather swap than clear inactive memory? I know people say that the Mac OS manages itself and whatever, but there is a serious performance dip ...
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6answers
5k views

Replacing hard disk with SSD or increasing RAM in MacBook Pro

I am using MacBook Pro for the last 1.5 years. Here is my configuration. 13" MacBook Pro, min-2010 2.4 GHz Core 2 Duo 4 GB RAM OS X Lion 10.7.4 Would you recommend upgrading to SSD for fast ...
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vote
0answers
90 views

Crashes and hangs after memory DOWNgrade

I recently lost one of my SO-DIMM memory modules on my 20" iMac (2.4GHZ Core 2 Duo alu), and now my iMac is back on 2GB memory from 4GB. Both were ValueSelect (DDR2 667MHz 200-pin) modules from ...
0
votes
4answers
1k views

Does the performance increases when the memory increases in Apple products?

I am planning to buy an iPad 3. My choices are, iPad 3 - 32GB with wifi iPad 3 - 16GB with wifi + 4G I'm so confused to select my best choice. Actually the problem is, some of my friends telling ...
17
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3answers
12k views

Why do Apple's latest MacBook Pros cap the RAM limit at 8GB?

According to apple's latest documentation (at the time of writing), the cap on the newest MacBook Pros is 8GB RAM. The Mac Pros, however, can take up to 32GB RAM. So, why do the MacBooks have this ...
1
vote
3answers
1k views

Memory usage on Mac OS, how Activity monitor works?

I have these stats, but is the system really using almost 4GB? This Inactive memory... Can't I use it? How should I interpret these stats?
1
vote
0answers
314 views

Sum of all processes' real memory not equal to used memory?

I wonder why the sum of all processes' real memory listed in Activity Monitor is not equal to (MUCH less than) the used memory?
0
votes
2answers
15k views

What are the differences between SDRAM and SO-DIMM RAM, and which should I use for my iMac?

I've started virtualizing Windows 7 on my Mac and I've realized 4GB of ram simply isn't enough for listening to music, surfing the web, virtualizing Windows, and running a compiler all at once. The ...
6
votes
2answers
3k views

Glitches in OS X - memory or ssd?

My laptop is Macbook pro 15', Early 2011, with an SSD drive - OCZ Agility 3 240GB. I changed my memory too to 16GB (Corsair from Amazon). I experience glitches: Also Skype refuses to launch. I ...
0
votes
2answers
158 views

Upgrading RAM of a MacBook

Is it possible to upgrade memory to 8 GB my model of MacBook? The manual says no, but on the web some people have made some videos about the upgrade. I don't know if any of them are fake.
3
votes
5answers
12k views

Can I use Kingston RAM in a MacBook Pro?

I have MacBook Pro 15-inch, early-2011. I want to upgrade my RAM from 4 GB (2+2) to 6 GB (2+4). Can I use Kingston RAM (Kingston 4GB DDR3 1333 Bus SOD)? Or is there specific RAM made for Macs?
6
votes
5answers
27k views

Will Early 2009 iMac accept faster-than-spec RAM?

I am looking to upgrade the RAM on my Early 2009 iMac from 4GB to 8GB. According to the memory specifications it accepts PC3-8500 204-pin SO-DIMMs. However, will the iMac accept faster RAM (e.g. PC3-...
1
vote
1answer
4k views

Can I upgrade my MacBook with more than 4GB of RAM?

I have an Early 2008 13 inch MacBook updated to Lion. According to this Apple KB the max RAM I can add is 4GB. I know the OS that came with the initial computer didn't support 64 bit. So is this 4 ...
2
votes
3answers
5k views

Add more RAM to my MacBook Pro 5,3

I got my MacBook Pro on October 2009 , here are the specifications: Processor 2.66 GHz Intel Core 2 Duo Memory 4 GB 1067 Mhz DDR3 Lion 10.7.3 15-inch, Mid 2009 Model Identifier: ...
0
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2answers
3k views

Should I buy Ram memory DDR3 1066MHz for Mac mini (Mid 2011)?

I got a Mac mini last year and now I want to update the ram memory. I was looking for it and I just found this (spanish). The guy is selling what you see on the picture and I'm worried if I get those ...
0
votes
1answer
313 views

Reason for the need to reboot my iPad

this is my first question here so go easy on me. Truth to be told it's not really a question, more like a curiosity. I noticed that after prolonged use of my 1st generation iPad without rebooting it (...
3
votes
3answers
34k views

Maximum memory for 2011 iMac

I just bought an iMac and want to max out the memory on the machine. I have received two conflicting answers to my question so I'm bringing it to the community. Can I install 4 8GB memory chips for a ...
2
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3answers
2k views

How can I benchmark my new RAM?

Based on the responses to my earlier question about memory replacement, I plan to upgrade soon. That said, once I've acquired and installed said memory, what is the recommended Mac software I should ...
18
votes
7answers
24k views

Is RAM upgrade worth it if I have an SSD already?

I recently purchased a Macbook Pro. I had an SSD from my last computer which I formatted, installed into my Mac, and used as my one and only HD (I don't need that much space so I didn't opt to do the ...
4
votes
3answers
2k views

OS X Lion behaving oddly after upgrading to 16GB RAM

Just upgraded Early 2011 Macbook Pro w/ 4GB RAM to 16GB RAM. System now sometimes runs smoothly and other times pauses frequently. Terminal keeps giving me 'System is low on disk space/memory' error....
6
votes
4answers
6k views

How much RAM can I add to my macbook

I have a 2008 macbook with a 2.1 GHz Intel Core 2 Duo. I am in the process of upgrading to Lion. I currently have 2GB 667 MHz DDR2 SDRAM What's the maximum amount of RAM I can put in and it have an ...
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vote
2answers
315 views

I'd like to upgrade my MacBook Pro's RAM and hard drive. What brands are reliable?

I do heavy web development/web design and run my software on a MacBook Pro (Mid 2009) 2.8ghz model. I use Adobe products, run virtual machines in Parallels, have multiple browsers open, text editors ...
0
votes
3answers
225 views

What do I need to look for when selecting new RAM for my MacbookPro8,1?

I'm looking at buying some extra RAM for my mid-2011 (?) MBP. OWC says that I can handle up to 16GB (2x8), though I might elect to go with "only" 8GB. I haven't bought computer components in a ...
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vote
3answers
5k views

Can I put this RAM into my iMac 27" mid 2010? (Corsair CMSO8GX3M2A1333C9)

I have an aluminium iMac (from mid/late 2010 I believe). I want to upgrade the memory from 4gb to 8 or 16. I'm no hardware guy, but from the info I read it would appear I can upgrade to any SO-DIMM ...
7
votes
2answers
5k views

Way to limit how much RAM an arbitrary process can take up?

Lets say we have a OS X machine running with 4 GB of RAM. Is it possible to set it up so no single process can take up more than say, 3 GB, so no matter how memory hogging a process is, there's always ...
5
votes
1answer
2k views

Mixing memory sizes

I'm looking at upgrading the memory in my mid-2011 iMac. Is there any problem with sticking in 2 4GB modules alongside the existing 2GB modules?
26
votes
6answers
129k views

Can I upgrade my MacBook mid 2010 to 16GB of RAM? (2x8G)

I bought a MacBook mid 2010 which I have upgraded to 8GB of RAM. But now, 8GB is not enough for me. I need more RAM for my work. Can I upgrade my MacBook's RAM to 16GB? I know the new Macbook Pros ...
0
votes
1answer
86 views

Does the Mac Pro 2008 display memory speeds accurately in System Information?

Can anyone confirm that when a Mac Pro 2008 has 800MHz FB-DIMMs installed it displays the Ram speed as 800Mhz in the System Information and not 667MHZ. I am running OS X Lion.
8
votes
10answers
40k views

Can I use 16GB DDR3-1600MHz RAM in an early Macbook Pro 8.2?

I found Macs which had: 16GB RAM installed 8GB RAM installed, but running on 1600MHz instead of 1333MHz (link in dutch) Question Is it possible to put 16GB running at 1600MHz in my Mac? If ...
0
votes
2answers
1k views

Will this brand of third-party RAM work in my Mid 2010 iMac?

I am looking to update my iMac's Mid 2010 RAM from 4GB to 12GB and wondering if this RAM is alright to use and what is the difference between the two sets of RAM because they are the same price, both ...
4
votes
2answers
190 views

Is there a way to receive a warning if memory is running low?

Sometimes I get tab happy with Google Chrome which chews up a lot of memory and slows down the system. Is there a way to get a warning when free memory falls below a certain threshold? That way I can ...
0
votes
1answer
97 views

Are the per process memory and other statistics defined the same as the system wide stats?

There's been a lot of posts about memory in OSX. None have really documented what the screen below speaks to. Especially the difference between private memory, and virtual private memory. Also does ...
2
votes
1answer
319 views

Any way to know what causes allocation of wired memory?

Activity Monitor lets me see how much memory is allocated as "wired", but I can't find a way to break the allocation down by applications or other memory consumers. Is there a tool out there that ...
2
votes
2answers
589 views

'09 mac mini hardware upgrade advice

Hello all I have an early '09 Mac mini 3,1 (Intel Core 2 duo 2GHz, 1GB RAM, 120GB HDD) which I need to upgrade soon as it is slowly dying (i.e., runnning an IDE like netbeans while having chrome open ...
3
votes
5answers
12k views

Can I use a PC3-10600 memory on a MacBook with PC3-8500 slots?

I have a MacBook (13-inch, Late 2009) with the default 2GB of RAM, I want to update it to 8GBs, but I only found this model of memory to buy. The question is since the memory is more "powerful" than ...
1
vote
1answer
81 views

OSX memory inconsistency (shared + private)

In the picture below the shouldn't the (shared memory + private memory) equal the real memory? Am I reading this wrong? What else constitutes the real memory size? I assumed that shared memory was ...
0
votes
1answer
639 views

Best 3rd party RAM for MacBook Pros? [closed]

I recently bought a 15" MacBook Pro (Late 2011) with 4GB of RAM. I want to upgrade to 8GB, but I've read that MacBooks can be kind of picky when it comes to RAM and will not operate right if it is ...
3
votes
5answers
8k views

Why would 2 sticks of 2GB RAM not work together, but work individually in my Macbook?

I have an older Macbook, specifically this model, and when I am upgrading the standard 1GB that it came with. I bought DDR2 667 PNY Memory - 2 X 2GB. According to those specs, my unit can manage 4GB. ...
2
votes
1answer
873 views

Silencing the Memory slot utility

I recently upgraded my Mac Pro with 24Gb of ram, quite the nice feeling. When I booted up the system again, I got this message : Quite nice I thought, seems the memory is working as it should. And ...
17
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3answers
40k views

What exactly does kernel_task do?

I'd just like to know what it is that kernel_task is responsible for. Also, what's an acceptable maximum RAM and CPU use for it?
3
votes
2answers
909 views

Do Mac Pros use NUMA?

Does Mac OS X make use of NUMA on Mac Pros with two (or more) CPUs?
29
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2answers
13k views

kernel_task using *way* too much memory

I have a 2008 Mac Mini with 4 GB of RAM. Recently (post installation of Lion), it started to behave extremely sluggishly, so I used Activity Monitor to see what was using up the system resources. ...
4
votes
3answers
24k views

How should different sized RAM be added to iMac?

I have a mid-2011 iMac which came with 4GB RAM (2x2GB). I just bought 8 GB (2x4GB) and added it to get a total of 12GB. The current configuration is as follows: Given that the RAM is a different ...