HT4255 Can/Should I install 2 x 8GB SDRAM in my iMac Mid-2010?

Can I install 2 x 8GB SDRAM in my iMac Mid-2010? I logged on to Crucial's website and they recommended 2 x 8GB of RAM. But Apple documentation only seems to say that a max of 4 GB SDRAM is supported. I'm currently using 2 x 2GB. My machine is slow (don't think upgrading to Lion helped permformance). Also, I remember years ago (I think) that RAM should be balanced . . . that is, if I currently have 2 x 2GB, I shouldn't add 2 x 4 GB (my machine has 4 slots), but rather have 4 x 2GB total or 2 x 4GB total. Guess my question is whether I'm better off with:
a. 4 x 2GB (i.e., add addition 2 x 2GB)
b. 2 x 4GB (i.e., remove the 2 x 2GB I currently have and replace with 2 x 4GB)
c. 2 x 8GB (i.e., remove the 2 x 2GB I currently have and replace with 2 x 8GB)
I do a lot of HD video editting.
Thanks,
Paul

Hi Paul,
I'm in the same boat. My iMac (mid-2010) 3.2GHz Intel Core i3 is running slow for the last little while. I haven't updated my apps in a while because of it. I want as much RAM as I can have and had previously read about iMac being able to take 32GB. And I've also read that the single channel v flex channel v dual channel is not really going to affect what I use the iMac for. So I'm just checking in to see how your upgrade went.
Currently, I have 2 x 2GB RAM.
Crucial recommend: 2 x 4GB RAM
http://www.crucial.com/store/partspecs.aspx?IMODULE=CT2KIT51264BF1339
Part Number: CT2KIT51264BF1339
Module Size: 8GB Kit (4GBx2)
Package: 204-pin SODIMM
Feature: DDR3 PC3-10600
Specs: DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 512Meg x 64 •
However, they have a 2 x 8GB RAM, which look to be the same parameters but they don't 'recommend it'.
http://www.crucial.com/store/partspecs.aspx?IMODULE=CT2KIT102464BF1339
Part Number: CT2KIT102464BF1339
Module Size: 16GB kit (8GBx2)
Package: 204-pin SODIMM
Feature: DDR3 PC3-10600
Specs: DDR3 PC3-10600 • CL=9 • Unbuffered • NON-ECC • DDR3-1333 • 1.35V • 1024Meg x 64 •
Can anyone advise on this - love to get the 16GB with my won 4GB to make it 20GB on flex channel.
Thanks
G

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1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
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You may not be able to understand the script yourself. But variations of the script have been posted on this website thousands of times over a period of years. The site is hosted by Apple, which does not allow it to be used to distribute harmful software. Any one of the millions of registered users could have read the script and raised the alarm if it was harmful. Then I would not be here now and you would not be reading this message.
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5. You may have started the computer in "safe" mode. Preferably, these steps should be taken in “normal” mode, under the conditions in which the problem is reproduced. If the system is now in safe mode and works well enough in normal mode to run the test, restart as usual. If you can only test in safe mode, do that.
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PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/libexec;clear;cd;p=(Software Hardware Memory Diagnostics Power FireWire Thunderbolt USB Fonts SerialATA 4 1000 25 5120 KiB/s 1024 85 \\b%% 20480 1 MB/s 25000 ports ' com.clark.\* \*dropbox \*GoogleDr\* \*k.AutoCAD\* \*k.Maya\* vidinst\* ' DYLD_INSERT_LIBRARIES\ DYLD_LIBRARY_PATH -86 "` route -n get default|awk '/e:/{print $2}' `" 25 N\\/A down up 102400 25600 recvfrom sendto CFBundleIdentifier 25 25 25 1000 MB com.apple.AirPortBaseStationAgent 464843899 51 5120 files );N5=${#p[@]};p[N5]=` networksetup -listnetworkserviceorder|awk ' NR>1 { sub(/^$[0-9]+$ /,"");n=$0;getline;} $NF=="'${p[26]}')" { sub(/.$/,"",$NF);print n;exit;} ' `;f=('\n%s: %s\n' '\n%s\n\n%s\n' '\nRAM details\n%s\n' %s\ %s '%s\n-\t%s\n' );S0() { echo ' { q=$NF+0;$NF="";u=$(NF-1);$(NF-1)="";gsub(/^ +| +$/,"");if(q>='${p[$1]}') printf("%s (UID %s) is using %s '${p[$2]}'",$0,u,q);} ';};s=(' /^ *$|CSConfigDot/d;s/^ */ 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END { if($3~/[0-9]/)print$3;} ' ' BEGIN { L='${p[36]}';} !/^[[:space:]]*(#.*)?$/ { l++;if(l<=L) f=f"\n "$0;} END { F=FILENAME;if(!F) exit;if(!f) f="\n [N/A]";"file -b "F|getline T;if(T!~/^(AS.+ (En.+ )?text$|(Bo|PO).+ sh.+ text ex)/) F=F" ("T")";printf("\nContents of %s\n%s\n",F,f);if(l>L) printf("\n ...and %s more line(s)\n",l-L);} ' ' s/^ ?n...://p;s/^ ?p...:/-'$'\t''/p;' 's/0/Off/p' ' END{print NR} ' ' /id: N|te: Y/{i++} END{print i} ' ' / / { print "'"${p[28]}"'";exit;};1;' '/ en/!s/\.//p' ' NR!=13{next};{sub(/[+-M]$/,"",$NF)};'"`S0 39 40`" ' $10~/\(L/&&$9!~"localhost" { sub(/.+:/,"",$9);print $1": "$9;} ' '/^ +r/s/.+"(.+)".+/\1/p' 's/(.+\.wdgt)\/(Contents\/)?Info\.plist$/\1/p' 's/^.+\/(.+)\.wdgt$/\1/p' ' /l: /{ /DVD/d;s/.+: //;b0'$'\n'' };/s: /{ /V/d;s/^ */- /;H;};$b0'$'\n'' d;:0'$'\n'' x;/APPLE [^:]+$/d;p;' ' /^find: /d;p;' "`S0 44 45`" ' BEGIN{FS="= "} /Path/{print $2} ' );c1=(system_profiler pmset\ -g nvram fdesetup find syslog df vm_stat sar ps sudo\ crontab sudo\ iotop top 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/Library/Preferences/com.apple.alf\ globalstate --proxy '-n get default' -I --dns -getdnsservers\ "${p[N5]}" -getinfo\ "${p[N5]}" -P -m\ / '' -n1 '-R -l1 -n1 -o prt -stats command,uid,prt' '--regexp --only-files --files com.apple.pkg.*|sort|uniq' -kl -l -s\ / '-R -l1 -n1 -o mem -stats command,uid,mem' '+c0 -i4TCP:0-1023' com.apple.dashboard\ layer-gadgets '-d /L*/Mana*/$USER&&echo On' '-app Safari WebKitDNSPrefetchingEnabled' "+c0 -l|awk '{print(\$1,\$3)}'|sort|uniq -c|sort -n|tail -1|awk '{print(\$2,\$3,\$1)}'" );N1=${#c2[@]};for j in {0..9};do c2[N1+j]=SP${p[j]}DataType;done;N2=${#c2[@]};for j in 0 1;do c2[N2+j]="-n ' syscall::'${p[33+j]}':return { @out[execname,uid]=sum(arg0) } tick-10sec { trunc(@out,1);exit(0);} '";done;l=(Restricted\ files Hidden\ apps 'Elapsed time (s)' POST Battery Safari\ extensions Bad\ plists 'High file counts' User Heat System\ load boot\ args FileVault Diagnostic\ reports Log 'Free space (MiB)' 'Swap (MiB)' Activity 'CPU per process' Login\ hook 'I/O per process' Mach\ ports kexts Daemons Agents launchd Startup\ items Admin\ access Root\ access Bundles dylibs Apps Font\ issues Inserted\ dylibs Firewall Proxies DNS TCP/IP Wi-Fi Profiles Root\ crontab User\ crontab 'Global login items' 'User login items' Spotlight Memory Listeners Widgets Parental\ Controls Prefetching SATA Descriptors );N3=${#l[@]};for i in 0 1 2;do l[N3+i]=${p[5+i]};done;N4=${#l[@]};for j in 0 1;do l[N4+j]="Current ${p[29+j]}stream data";done;A0() { id -G|grep -qw 80;v[1]=$?;((v[1]==0))&&sudo true;v[2]=$?;v[3]=`date +%s`;clear >&-;date '+Start time: %T %D%n';};for i in 0 1;do eval ' A'$((1+i))'() { v=` eval "${c1[$1]} ${c2[$2]}"|'${c1[30+i]}' "${s[$3]}" `;[[ "$v" ]];};A'$((3+i))'() { v=` while read i;do [[ "$i" ]]&&eval "${c1[$1]} ${c2[$2]}" \"$i\"|'${c1[30+i]}' "${s[$3]}";done<<<"${v[$4]}" `;[[ "$v" ]];};A'$((5+i))'() { v=` while read i;do '${c1[30+i]}' "${s[$1]}" "$i";done<<<"${v[$2]}" `;[[ "$v" ]];};';done;A7(){ v=$((`date +%s`-v[3]));};B2(){ v[$1]="$v";};for i in 0 1;do eval ' B'$i'() { v=;((v['$((i+1))']==0))||{ v=No;false;};};B'$((3+i))'() { v[$2]=`'${c1[30+i]}' "${s[$3]}"<<<"${v[$1]}"`;} ';done;B5(){ v[$1]="${v[$1]}"$'\n'"${v[$2]}";};B6() { v=` paste -d: <(printf "${v[$1]}") <(printf "${v[$2]}")|awk -F: ' {printf("'"${f[$3]}"'",$1,$2)} ' `;};B7(){ v=`grep -Fv "${v[$1]}"<<<"$v"`;};C0(){ [[ "$v" ]]&&echo "$v";};C1() { [[ "$v" ]]&&printf "${f[$1]}" "${l[$2]}" "$v";};C2() { v=`echo $v`;[[ "$v" != 0 ]]&&C1 0 $1;};C3() { v=`sed -E "$s"<<<"$v"`&&C1 1 $1;};for i in 1 2;do for j in 0 2 3;do eval D$i$j'(){ A'$i' $1 $2 $3; C'$j' $4;};';done;done;{ A0;D20 0 $((N1+1)) 2;D10 0 $N1 1;B0;C2 27;B0&&! B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D23 0 $((N1+4)) 5 4;D13 0 $((N1+9)) 59 50;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 35 49 61 51;D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 44 54 45;D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D13 24 24 32 31;D13 25 37 32 33;A2 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 62 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;B1&&D23 35 45 55 46;D23 32 31 43 38;D12 36 47 32 48;D13 20 42 32 41;D13 37 2 48 43;D13 4 5 32 1;D13 4 3 60 5;D12 26 48 49 49;B3 4 22 57;A1 26 46 56;B7 22;B3 0 0 58;C3 47;D22 4 4 50 0;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
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Click anywhere in the Terminal window and paste by pressing command-V. The text you pasted should vanish immediately. If it doesn't, press the return key.
9. If you see an error message in the Terminal window such as "Syntax error" or "Event not found," enter
exec bash
and press return. Then paste the script again.
10. If you're logged in as an administrator, you'll be prompted for your login password. Nothing will be displayed when you type it. You will not see the usual dots in place of typed characters. Make sure caps lock is off. Type carefully and then press return. You may get a one-time warning to be careful. If you make three failed attempts to enter the password, the test will run anyway, but it will produce less information. In most cases, the difference is not important. If you don't know the password, or if you prefer not to enter it, press the key combination control-C or just press return three times at the password prompt. Again, the script will still run.
If you're not logged in as an administrator, you won't be prompted for a password. The test will still run. It just won't do anything that requires administrator privileges.
11. The test may take a few minutes to run, depending on how many files you have and the speed of the computer. A computer that's abnormally slow may take longer to run the test. While it's running, there will be nothing in the Terminal window and no indication of progress. Wait for the line
[Process completed]
to appear. If you don't see it within half an hour or so, the test probably won't complete in a reasonable time. In that case, close the Terminal window and report what happened. No harm will be done.
12. When the test is complete, quit Terminal. The results will have been copied to the Clipboard automatically. They are not shown in the Terminal window. Please don't copy anything from there. All you have to do is start a reply to this comment and then paste by pressing command-V again.
At the top of the results, there will be a line that begins with the words "Start time." If you don't see that, but instead see a mass of gibberish, you didn't wait for the "Process completed" message to appear in the Terminal window. Please wait for it and try again.
If any private information, such as your name or email address, appears in the results, anonymize it before posting. Usually that won't be necessary.
13. When you post the results, you might see an error message on the web page: "You have included content in your post that is not permitted," or "You are not authorized to post." That's a bug in the forum software. Please post the test results on Pastebin, then post a link here to the page you created.
14. This is a public forum, and others may give you advice based on the results of the test. They speak only for themselves, and I don't necessarily agree with them.
Copyright © 2014 by Linc Davis. As the sole author of this work, I reserve all rights to it except as provided in the Use Agreement for the Apple Support Communities website ("ASC"). Readers of ASC may copy it for their own personal use. Neither the whole nor any part may be redistributed.

I have an iMac mid-2010 running Snow Leopard. Is it possible to install Mavericks and Windows 8 on separate partitions while keeping Snow Leopard?

I have an iMac mid-2010 running Snow Leopard 10.6.8. Is it possible to install Mavericks and Windows 8 on separate partitions while keeping Snow Leopard? If so, can you describe the steps?

That should not be a problem as long as there is enough room on each partition for each OS.
You would:
Use Disk Utility to partition your HD
Download the Mavericks installer and install it on one of the open partitions (when you run the installer from your 10.6.8 partition, it will ask you where you want to put Mavericks, and you will specify one of the open partitions).
Use Boot Camp to install Windows on another of the open partitions. Mac Basics: Using Windows on your Mac via Boot Camp

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red-keys out of order, and --Volume corrupt, can't be repaired. I tried

I have an iMac mid 2010. After Disk utilities said the drive was corrupt, I ran the hardware test (extended) 3 times. No problems. I than ran Disk utility again and got 2 messages in red…keys out of order, and ……Volume corrupt, can't be repaired.
I tried to do a system install, but message said…disk can't be changed. Will a complete erase and install fix this ?
Everything is backed-up.

There's hardware and software.
Your drive could physically be in good condition but something has caused the file structure to be messed up (it just happens sometimes). The directory that keep track of files is corrupt. Disk Utility can help determine if that is the issue. In some cases it can repair the problem but it cannot do it to a drive that is being used to boot the system while you are doing that. You have to boot from another drive. Some things DU cannot repair and you need to try a stronger utility such as Diskwarrior.
A failing hard drive (one with mechanical issues) can be a cause of file structure issues but this is by no means always the case. Apart from looking at the SMART diagnosis feature of Disk Utility (and smart isn't totally reliable) there often isn't a way to tell if a drive is failing until it suddenly happens, which is why you need to maintain backups.
In your situation it does sound serious and not just minor directory corruption. You can try erasing (formatting) the drive, You may need to do this if it is really corrupt, in which case there could be underlying physical issues. I use old technology but if you have the patience you can try erasing the drive with the security option of writing zeros once (don't do more unless you are going on a 3 week vacation). This makes the drive not simply assume everything is okay by forcing it try every part of the drive by writing data. If something is gong wrong you may find it marks a lot of bad sectors, or flat out refuses to format. Then you know you need a new drive.

Hi, did anybody try to install windows 8.1 on an imac mid 2007?

hi, did anybody try to install windows 8.1 on an imac mid 2007? is it absolutely impossible? Thank you V

if it is not supported then you can always install windows8.1 in a virtual machine if you don't need to play 3d games is have enough memory in your mac then that is just as good

Since I have installed OS X Mavericks, my Macbook pro (Mid 2010) shut down unexpectly everytime when I uploading image.

Since I have installed OS X Mavericks, my Macbook pro (Mid 2010) shut down unexpectly everytime when I uploading image to Facebook or Ebay. What can I do?

A number of folks have posted similar crashing-related reports with that same system.
http://www.macworld.com/article/2062783/cures-for-a-panicking-mid-2010-macbook-p ro.html
You may wish to contact Apple support.

Can I start up intel imac mid 2010 model running os 10.7 with a verbatim external drive running os 10.6 so I can run some older power pc apps to get and archive old data

can I start up an intel imac mid 2010 model running 10.74 with an external verbatim drive running os 10.6 so I can access data on some powerpc applications. If so any help on procedure would be great. thanks for any help

Yes, that model can be booted into Snow Leopard 10.6.3 or later. Use the discs that came with the computer to install a compatible version of OS X for the model.

Can I connect a blue ray player/burner to my mid 2010 MacBook Pro 17"?

Can I connect a blue ray player/burner to my mid 2010 MacBook Pro 17"?

Yes. Here are a couple:
Blu-ray Player 2.8.2.1183
iDeer Blu-ray Player 1.2.3.1183

Can I use the new Time Capsule to backup my mid 2010 Macbook Pro? Also can I want to free up my hard disk, can I save my photos and files on the time capsule and later access through wifi?

Can I use the new Time Capsule to backup my mid 2010 Macbook Pro? Also can I want to free up my hard disk, can I save my photos and files on the time capsule and later access through wifi?

Can I use the new Time Capsule to backup my mid 2010 Macbook Pro?
Yes, if you are asking about using Time Machine to backup the Mac.
Also can I want to free up my hard disk, can I save my photos and files on the time capsule and later access through wifi?
You are not thinking of deleting the photos and files on your Mac, are you? If you do this, you will have no backups for those files.
Another concern is that Time Machine backs up the changes on your Mac. At some point, Time Machine will automatically delete the photos and files from the Time Capsule.....you just don't know when this might occur.
In other words, only delete files from your Mac that you can afford to lose.

How can i fix my mac book pro i bought in mid 2010, it is slowing down. the pin wheel does spin a alot.

how can i fix my mac book pro i bought in mid 2010, it is slowing down. the pin wheel does spin a alot.

try this;
open disk utility - verify disk permissions - repair disk permissions if errors are found. might take an hour or less - depending on how much errors needs to be repaired.
restart your macbook and see if that sorts it out for you.
also check your hard drive space. if your hard drive is almost full, that will also contribute to your macbook getting slower....
good luck

I have an iMac (Mid 2010) and am running 0sx 10.8.5 and the WiFi always loses connection during sleep mode. I have seen numerous different solutions none of which seem to work. Can anyone help?

I have an iMac (Mid 2010) and am running 0sx 10.8.5 and the WiFi always loses connection during sleep mode. I have seen numerous different solutions none of which seem to work. Can anyone help?

Test after taking each of the following steps that you haven't already tried. Back up all data before making any changes.
1. Make sure the network is on the preferred list by following these instructions. It's important to read the article carefully, as it's the starting point for any further efforts to solve the problem. If you skip any of the steps, the problem may not be solved. Make sure the box marked
          Remember networks this computer has joined
is checked.
2. Follow the instructions in this support article under the heading
          Symptom: After restarting or waking from sleep, my computer might not connect to the Internet
3. Reset the PRAM.
4. Make a note of all your settings for Wi-Fi in the Network preference pane, then delete the connection from the connection list and recreate it with the same settings. You do this by clicking the plus-sign icon below the connection list, and selecting Wi-Fi as the interface in the sheet that opens. Select Join other network from the Network Name menu, then select your network. Enter the password when prompted and save it in the keychain.
5. From the Location menu at the top of the Network preference pane, select Edit Locations. A sheet will drop down. Click the plus-sign button to create a new location. Give it any name you want. In the new location, set up the Wi-Fi service with the same settings you used before. Click Apply and test.
6. Launch the Keychain Access application. Search for and delete all AirPort network password items that refer to the network. Make a note of the password first.
7. Repair permissions on the startup volume.
8. Turn off Bluetooth and test.
9. Reset the System Management Controller.
10. This step shouldn't be necessary, but has been advised by Apple Support in some cases, apparently as a workaround for a bug. Open the Energy Saver pane in System Preferences. If applicable, click the padlock icon in the lower left corner to unlock the settings. Enter your administrator login password when prompted.
Select the Power Adapter tab and uncheck the boxes marked
          Wake for Wi-Fi network access
and
          Enable Power Nap...
if present. Then, if the computer is a MacBook, select the Battery tab and uncheck
          Enable Power Nap...
11. Reinstall OS X.

HT4255 Can/Should I install 2 x 8GB SDRAM in my iMac Mid-2010?

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