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
50 views

Can you upgrade the RAM in the latest MacBook Airs if you ship them to Apple themselves?

I know that RAM is soldered onto the mainboard on the latest MacBook Airs, which makes a DIY upgrade apparently impossible. But would Apple do it instead though? The guy at the Apple Store told me ...
0
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2answers
2k views

Mac has become insanely slow : Processes SystemUIServer, UserEventAgent and loginwindow using a lot of memory

I have been using my Mac for for many months without any problem. But recently all of a sudden the Mac became insanely slow. I opened Activity Manager to see what was happening. For three processes ...
0
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6answers
5k views

Yosemite freezing/lagging constantly on 13" MacBook Pro (Mid 2012)

I'm running OS X Yosemite 10.10.1 on a mid 2012 13" MacBook Pro with the 2.5 GHz Intel Core i5 processor and 4GB of RAM. The hard drive (the 500 GB, regular HDD) was replaced about a year ago (close ...
0
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0answers
9 views

Fortran incorrect checksum for freed object [on hold]

I am running a fortran code I wrote myself. The code works fine : each functions execute properly and does what I expect. To simplify I have construct large complex matrices to solve a linear problem ...
0
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0answers
25 views

When are macbook pro's becoming available with 32GB of RAM? [on hold]

I do distributed computing development including running numerous VM's and heavily loaded IDE's (several simultaneously). 16GB is just barely getting started. Any clues from apple when 32GB hits the ...
0
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1answer
176 views

Moving iPhoto to external drive on a MacBook Pro (Retina, 13-inch, Mid 2014) with 8 GB 1600 MHz DDR3

I bought a Seagate external HD 500gb with my Mac. Recently started using Photoshop and Lightroom, which take up a ton of space. I was thinking of moving my entire iPhoto to the Seagate to free up ...
1
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3answers
900 views

Mac becomes slow and unresponsive when opening complex pdf

So I a trying to open some lecture slides from my university to study however when I try to open certain PDF files the system becomes extremely slow and unresponsive. Details of the PDF (Blurred out ...
7
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8answers
22k 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 ...
1
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3answers
102 views

RAM usage on a slow MacBook with OS X Yosemite

I'm helping a friend with his MacBook. The problem is that his MacBook is kind of slow. He has 2 GB of RAM. I'm not familiar with Apple things at all, so I tried to see RAM usage with the activity ...
1
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1answer
22 views

will RAM from a mid-2011 MacBook Pro work in an early 2011 iMac?

Will RAM from a mid-2011 MBP work in an early 2011 iMac (and vice-versa)? Both are listed as 1333 MHz PC3-10600 DDR3. I have 16 GB (2x8GB) in the MacBook Pro, and 12 GB (2x4GB + 2x8GB) in the iMac. ...
0
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1answer
27 views

SSD in enclosure does not mount on older MacBook Pro

I bought a Crucial SSD compatible with my MacBook Pro (late 2007) and an enclosure. To my frustration, it would not mount and I think the hardware may be defective. Sometimes, I get it to mount and ...
0
votes
1answer
36 views

iOS storage disappearing

I've got an iPhone 5s 8gb with about 1.4gb of free storage. Within the last week this storage goes down to zero multiple times a day just through normal use. When this happens iOS "cleans" all apps ...
2
votes
1answer
2k views

Is there a firmware upgrade for the Macbook6,1 from MB61.00C8.B00 to B02?

This question is directly relevant to my failing attempts to upgrade the RAM in a Late 2009 White Unibody MacBook (MacBook6,1) to 8GB, and the question may be better asked in that context. It is ...
6
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2answers
2k 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
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0answers
15 views

RAM Upgrade questions

I currently own a mid-2011 iMac which currently has 4 GB of RAM. The computer is currently running OS X Mavericks but I am thinking of upgrading it to Yosemite soon... I often use the computer to ...
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0answers
36 views

MacBook Pro does 3 beeps at startup once in a while, AHT finds nothing

My brother's early 2011 MacBook Pro intermittently refuses to boot: instead of doing the normal boot chime and the grey screen, it produces three short beeps every five seconds without the screen ...
0
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0answers
22 views

MacBook Pro Retina 15 Early 2013 - Lagging

I am currently using a MacBook Pro Retina 15" (Early 2013). It has been working like a charm for the last 1 and a half years but now I am seeing that the computer is slowing down when I used it for ...
0
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2answers
781 views

Will this RAM work for me? (Late 2009 iMac)

I have a 27-inch iMac late 2009 desktop computer and i'm looking to upgrade my ram. The best RAM I can find is a Kingston 2GB, DDR3-1066, PC3-8500, CL7, DIMM. What I currently have is 4GB 1067 MHz ...
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0answers
18 views

Settings App underreporting available memory?

Iphone 4S, iOS 7.1.2: Settings --> General --> Usage reports 0 bytes available, yet I can still download and install apps and files. Does anyone know if Apple is doing us a "favour" by underreporting ...
4
votes
2answers
11k views

MacBook Pro 13-inch maximum memory

This Apple support article, MacBook Pro: How to remove or install memory, says that the maximum memory on a MacBook Pro 13-inch is 8 GB. Is that a hard limit? Why could I not install a 16 GB memory ...
1
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0answers
19 views

Disable Quicklook for certain filetypes

We have a few Mac's that choke on folders that have a lot of .TIFF files in them. The quicklookd process, and Quicklook Helper processes skyrocket in RAM and CPU usage. I'd like to keep quicklook ...
1
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1answer
2k views

Macbook Pro (5.1 Model Late 2008) 16GB RAM upgrade

Can I add 16GB of RAM in my MacBook Pro (5.1 model, late 2008) running at 1333 DIMMs?
29
votes
3answers
20k views

What scale or measure does Mavericks' and Yosemite's “memory pressure” adhere to?

Mavericks' (and also Yosemite's) Activity Monitor shows a new diagram, the memory pressure. Sadly, its help text only vaguely explains what exactly it measures. How is memory pressure calculated? ...
8
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1answer
4k views

vm_compressor_mode (vm.compressor_mode) values for enabled compressed memory in OS X

Background In Super user, with an accepted answer: Disable compressed memory in Mac OS 10.9 Mavericks? Also in Super User: how to get memory compress back in Mac OS 10.9 Mavericks? – and ...
0
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1answer
24 views

How to install SSD on late 2007 MacBook Pro (15 inch)

I have a slot on the left-hand side of my MacBook Pro (late 2007, NOT a unibody) and am wondering: is this slot suited for an SSD that I can simply stick in? Or would I have to install an SSD ...
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0answers
22 views

How did a process with an url as a name executed at my macos?

Is it some sort of chrome malfunction? - The process seems inactive, it has "http://www.imore.com/, ..." as the name, with a lego-like plugin icon, a default icon I suspect it might have been an ...
0
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1answer
23 views

iMac 27" Mid 2010 RAM Upgrade

I have an iMac 27", Mid 2010 (11,3 model). Can it take 8GB RAM modules? Apple's website http://support.apple.com/en-us/ht4255 says "The maximum amount of RAM you can install in your computer is 16 GB ...
0
votes
1answer
185 views

Root Device UUID Error while installing Mountain Lion on VirtualBox 4.3

While installing Mountain Lion on VirtualBox, it starts booting, then stops at the line "root device uuid: xxxx-xxxxx-xxxx". I've allocated all the required RAM and memory, but even after looking ...
0
votes
1answer
32 views

Macbook Pro Ram and/or Processor broken?

I am experiencing several problems with my MacBook Pro early 2011. It all started about two months ago with my wifi card. It lost connection to the network every few hours. The symbol in the status ...
0
votes
1answer
28 views

Is it possible to use old RAM on new MacBook?

My current MacBook Pro, a early-2013 13" i5, is getting very slow and I therefore want to buy a new one. However, I want to wait until the next generation comes out. In the meantime I will change the ...
1
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1answer
51 views

Upgrading 16 GB to a 4 GB iMac i5 2011 doesn't work with all modules loaded [SOLVED]

I don't know if it is only my issue. I have a 2011 iMac i5 with 2x2GB RAM modules. Recently I bought 2x8GB RAM modules. If I add the 2x8GB to the default 4GB RAM, the computer doesn't start. I hear ...
1
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0answers
35 views

Apple Mail Using Excessive Memory

Recently, whenever I attempt to compose a message in Apple Mail, my entire system slows to a screeching halt and I have to shut mail down before I can have access to any other application. What's ...
3
votes
2answers
2k views

iMac ram memory installing 16GB vs 20GB

I have a mid-2011 27" iMac with i7 processor. It came with 4 gigs of ram (2x2GB). I just bought 2x8GB of matched memory. I am wondering two things 1. is it good/bad/neutral to leave in the ...
1
vote
1answer
78 views

Total memory doesn't add up in Activity Monitor

My computer's been really slow, to the point where it's almost unusable, and according to Activity Monitor, it's because the physical memory's basically all being used (the CPU usage is fine). ...
1
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1answer
22 views

Mounting a RAM disk on startup, but seems to be unmounted automatically

I wrote a simple script that mounts a ram disk: %> cat /System/Library/LaunchDaemons/ramdisk.plist <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST ...
4
votes
1answer
6k views

Safari 8.0 on Yosemite doesn't kill closed tab processes, hogs memory

I've just upgraded to Yosemite and started using the new Safari 8.0. For a while, everything seemed fine, but then all got ever so slightly slower and slower, especially when switching desktops. ...
1
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1answer
43 views

Mac is slower and has strange nuances in operation after liquid contact

I need some advice with my MBP late 2011 model (13″ Intel i5, 2.4 GHz, 500 GB HDD, 4 GB RAM). It all started one day when was a heavy rain which went through my windows. I had my Mac on my bed and my ...
0
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0answers
35 views

Why does Instruments say that WebKit in iOS (Safari) is allocating 200 MB of ram when I request a 15 MB file?

I am helping develop a cross platform web app, and we want to store about 20MB of data on the client. We are using the Application Cache to store our HTML, CSS, and JavaScript, and we are using the ...
9
votes
3answers
18k 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?
0
votes
2answers
2k views

Compatible RAM and SSD drive for macbook pro 2012 MD101

I want to help a friend upgrading her macbook pro macbook 2012 MD101 from 4GB RAM and HDD to 8GB RAM and SSD. Since I am not a mac guy myself, I need to ask you guys what is the compatible RAM ...
3
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3answers
10k views

Kernel_task using 300% CPU time, high fan speed and slow computer in MacBook Pro

My MacBook Pro has become slow lately. Activity monitor shows kernel task is using around 300% CPU. The fan is always on at high speed. Below are the details of my computer: Macbook Pro 13-inch, Mid ...
1
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3answers
157 views

Best OS X for late 2009 MacBook

I have a white 13" MacBook (late 2009) with 2GB memory. It is currently running Mavericks. The machine is too slow, probably because the memory is just 2GB. I'm considering downgrading it back to ...
0
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0answers
69 views

iTunes and iPhone disagree on memory usage

There is a large discrepancy between the memory usage as reported by my iPhone and that as reported by iTunes - as well as between iTunes' Settings pages for the iPhone and the iTunes memory bar at ...
0
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0answers
15 views

Yosemite on Macbook pro - Memory constantly almost full [duplicate]

My Macbook is a late 2013 model with 8GB's of memory. I've recently been experiencing a scenario whereby my memory is constantly at 99% of the 8GBs I have, but there's no clear culprit on which ...
1
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0answers
363 views

Yosimite Detects Faulty RAM Module but Apple Hardware Test Does not?

I just bought a used MacPro3,1 on Amazon. The system came with Mac OS X 10.6 but I downloaded Yosimtie and it states that one of the 2GB modules is faulty. When I installed Yosemite it wiped ...
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1answer
13k views

Restoring iPhone as a new iPhone but backing up contacts

I have an iCloud account, but I am backing up via iTunes. I want to restore my iPhone because of the "other" files taking up a really huge portion of my phone's memory (2 GB and I have only ...
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6answers
16k views

MacBook Pro RAM upgrade is causing beeping sound?

I just upgraded the RAM in my MacBook Pro (15" 2 GHz Intel Core i7 - early 2011 model) from two 2gb modules to two 4gb modules. Started up just fine and ran great for about 10 minutes. Then the screen ...
0
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0answers
16 views

Does OS X Manage RAM? [duplicate]

I was reading this SuperUser question, and it made me wonder, does OS X do any sort of memory managment, or does alloc() just fail to allocate memory, causing the process to crash?
0
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0answers
33 views

macbook air mid 13 overheating

My set up is macbook air mid 13 with i7 processor and 8GB of ram running OS X Yosemite. Which is plenty for my use, at least it has been. I usually have no more than 3 apps running as notes, reminders ...
1
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2answers
112 views

My Mac recently using RAM like hell?

I have 8 GB of ram and I have only 1.25GB free memory left, not enough to run 2 tabs of gmail. for chrome keep asking me to kill the process of my Gmail which 2-3 days ago I'm always have like 2-3GB ...