MacOS Mojave running too slow -

Discussion in 'macOS Mojave (10.14)' started by Mysons, Aug 10, 2019.

  1. Mysons macrumors newbie

    Aug 10, 2019
    Hi ! First post - Thank-you!

    I have a MacOS Mojave - Ver 10.14.6

    Its super slow - most of the application take for ever to open , some crash or won't open - Safari doesn't always connect and would it be better if I reinstall Mac Operating system -

    How can I reinstall or rebuild my MacOS Mojave from scratch

    Its an old Mac and perhaps it needs a through out cleaning or reinstall -

    Any Suggestions -

    Model Name: MacBook Pro

    Model Identifier: MacBookPro9,2

    Processor Name: Intel Core i5

    Processor Speed: 2.5 GHz

    Number of Processors: 1

    Total Number of Cores: 2

    L2 Cache (per Core): 256 KB

    L3 Cache: 3 MB

    Hyper-Threading Technology: Enabled

    Memory: 4 GB

    Boot ROM Version:
  2. avz macrumors 6502

    Oct 7, 2018
    It is most likely that all you need is to upgrade your old HDD to SSD.
  3. mikzn macrumors 65816


    Sep 2, 2013
    yeah - I agree with avz - most likely HDD is the reason - upgrade to a SSD for that model will make a big difference and something like a samsung evo 860 would make it much faster

    Also how much space is left on the HDD - did it come with 500g HDD? you can get a 500g or even a 1tb for a pretty reasonable price

    memory might be worth upgrading to 8g - but the ssd will make a bigger difference
  4. Furstyferret1959 macrumors newbie


    Aug 10, 2019
    I have been having a problem over the past few weeks with safari not connecting to my Router .....found it's bit strange as all other devices were connected and computer said it was connected ....well messed about all morning and have managed to solve the problem. If you would like the solution just drop me an email and I will pass on the solution.
  5. Mysons thread starter macrumors newbie

    Aug 10, 2019
    Great!! Good to hear there are some alternatives - A new SSD is ok - I have a 1TB HDD at present time - with 4G of memory - unsure if this Mac can support an upgrade to 8GB - (4GB(2)) - I will need to purchase memory at the same time

    Anything else, would I have to re-install OS once I replaced the SSD - how is that done ..

  6. CoastalOR macrumors 68020


    Jan 19, 2015
    Oregon, USA
    Your Mac can support up to 16 GB of memory.
    You will have to format the new SSD for Mac before installing the OS. If you want to move over the data, settings, and apps from your old HDD to the new SSD then you will need both drives connected or a backup of the old HDD connected during the SSD setup.

    Here is Apples instructions:

    If it was me, I would get an external drive (USB3) enclosure, install the new ssd in the external, boot to internet recovery, format the new SSD for macOS, install the macOS to the SSD, migrate the data from the internal HDD to SSD. After OS installation and data migration then boot from the new SSD that is still in the external enclosure. Make sure everything is working ok. Then you can open up your MBP to swap the new SSD for the old HDD and install the new RAM if you have it.

    Here is a external drive enclosure that has worked well for me:
  7. Mysons thread starter macrumors newbie

    Aug 10, 2019
    THANK-YOU All ! For your wonderful suggestions and support - Much appreciated - I will put all of your suggestions in use
    and in considerations. Once I get all of this printed off - i will start planning on purchasing a new SSD and more memory


  8. Fishrrman macrumors P6


    Feb 20, 2009
    You don't have to buy "the fastest" SSD.
    Just "shop for price".
    I'd suggest Crucial or Sandisk.

    As for RAM, you could just replace "the topmost" RAM DIMM (when you have the back off) with an 8gb DIMM.
    This will give you 10gb of installed RAM, far more than 4gb, and probably more than you'll need.
    There's no point in spending more money for more RAM here.

    Go to to see the procedure for opening the MBP and replacing the HDD and RAM.
    It's easy.
    You'll need a Phillips #00 driver and a TORX T-6 (latter to take the "bosses" off the side of the old drive and move them over to the new one).

    As mentioned above, you ought to pick up a 2.5" USB3 external enclosure as well for the old drive.
    BUT... put the SSD into it FIRST.
    Now you can format the drive, and set it up BEFORE you actually open up the MBP.
    Doing it this way can save you A LOT OF TROUBLE.
  9. Mysons thread starter macrumors newbie

    Aug 10, 2019
  10. Mysons thread starter macrumors newbie

    Aug 10, 2019
    Thanks to all members who replied with support -

    Thank-you Fishrrman,

    Much appreciate your support , to ensure I get the right SSD and Ram

    Is there a specific SSD drive I'll be looking for to purchase and Ram for my Macbook - Can I search in Amazon or Ebay
    I want to make sure I purchase the right components -

    Best regards

  11. Mysons thread starter macrumors newbie

    Aug 10, 2019
    HELP!! I formatted the HD (old) then proceeded to reinstall from macOS recovery - follow instructions from apple store support

    Startup from macOS recovery - Command -R
    Selected Reinstall macOS
    chose reinstall MacOS from utilities window
    Read & press agree window

    The window is stuck at MacOS Mojave - Select the disk where you want to install macOS

    There is no options or gave no options to choose your disk to begin th install - its been at the same screen for more than 0 mins now... Help!!


  12. Mysons thread starter macrumors newbie

    Aug 10, 2019
    I restarted my internet router and rebooted mac and retired the recovery/install -
    Finally got to the next screen where to select a disk - the window is blank - no disk showing - I used the utility menu to erase both of my disk 1 an main disk both 500GB =

    tried again - still no disk to select or showing

    Any suggestions
  13. Honza1 macrumors 6502

    Nov 30, 2013
    This is suspicious - looks like hardware issue. Would you have Apple store nearby? They should help you for free to install OS on the disk. Possibly identify any hardware issues. Or identify other issues - like if you have properly formatted the disk - you need GUID partition map and HFS+ format for hard drive. But even if incorrectly formatted, installer should offer that it will format the disk for you...
    My own action would be to create bootable USB with installer on it, boot from that and see, if I can see/partition/format internal hard drive from there. If all looks OK, I would try to install from there. But that needs second Mac and some experience, which I am not sure you have. If you have second Mac, 8GB or larger USB disk (free, it will be formatted) and time, google Create USB macOS install disk and follow instructions. Then plug in and boot your MBP with opt key pressed and that should offer selection of bootable volumes. Boot on the USB and use DiskUtility to evaluate your disk etc.
  14. Mysons, Aug 15, 2019 at 11:00 PM
    Last edited: Aug 15, 2019 at 11:32 PM

    Mysons thread starter macrumors newbie

    Aug 10, 2019
    Thanks Honza1 - I managed to successfully install the MAcOS after-all - However, I'm a little confused
    When i click on about this Mac - It doesn't show I installed MacOS Mojave - It only shows Macbook Pro

    I tried to go to the apple Store and searched for MacOs Mojave , tried to Get or download - I can't download it - It says the update requires MacOS version 10.8 or later ??

    Did I not installed it properly ? I followed th exact steps illustrated in the Apple Support how to reinstall MacOS for Mojave -

    Any suggestions - This is now becoming way out of my league...

    Is there another possible way to install what I previous had as a tacos Mojave -


  15. vince22, Aug 16, 2019 at 6:57 AM
    Last edited: Aug 17, 2019 at 2:53 PM

    vince22 macrumors regular


    Oct 12, 2013
    View attachment 853240
    i would recommend buy new SSD and create a bootable USB disk, i have the same old 2012 MBP 9.2 like yours, if you like to push it with RAID0 (Samsung Evo 860) it runs very well with Mojave.
  16. Honza1 macrumors 6502

    Nov 30, 2013
    When I said Apple store, I meant physical store. Apple store Genius Bar provides very good support - typically free - for any Apple device and especially for those with less experience, they are amazing resource. On line "Apple store" you meant is really "App store" for macOS.
    Can you attach your "About this Mac" screen? I wonder if you run Internet recovery and installed original OSX version - Internet recovery will reinstall ORIGINAL version of OSX which machine came with - and that would be 10.7.3 based on records in database. Your troubles seem to indicate that. If that is the case, this needs to be first upgraded to higher version (10.8, 10.9, or may be higher) and only then you will be able to upgrade to current version.
    My original suggestion was to install from USB installer - which would work with Mojave, but with 10.7.3 you are not allowed to even download Mojave from App store as upgrade from that old version is not supported.
    So, go to Apple App store and find/download any higher version of OSX system which they will let you download for free and install that. 10.8, 10.9, whatever higher they let you instal1l as upgrade. After that upgrade you should be allowed to upgrade directly to Mojave.
    And again, you will have much more powerful device if you swap the HD for SSD - and 500Gb SSD suitable for your system may cost today $70-90 on Amazon.
  17. Mysons thread starter macrumors newbie

    Aug 10, 2019

    I searched the Apple store download section , was unable to find any higher version of OSX system past 10.7 -
    They talk abut 10.5 or 10.7 - Is there direct link i can download this higher version of OSX system -

    The USB installer is also adoption I'd like to ry so i always have a copy of the Bootable disk - How do I do that?

    If I can find a way to install a higher version of OSX so I can be able to download and install Mojave form apple store that would be great.

    Thanks in advance

  18. Honza1 macrumors 6502

    Nov 30, 2013
    As Mr. Google would tell you in microseconds if you just asked "Download OSX 10.8" - direct downloads:

    This page has also Mavericks 10.9.5 or ELCapitan 10.11.6 here, I would try if I can get ElCap installed first and if yes, then Mojave should install after that.

    Suggestion: learn about Mr.Google. Very useful friend ;-)
  19. Mysons, Aug 16, 2019 at 11:10 AM
    Last edited: Aug 16, 2019 at 11:52 AM

    Mysons thread starter macrumors newbie

    Aug 10, 2019
    Thanks Mr. Honza1 - Mr. Google was indeed very friendly and helpful -

    However, I tried all of the above - when selecting any - th download button or icon is blank
    perhaps maybe I should install an older version or just go with creating a USB bootable disk

    Thanks Again!!
  20. CoastalOR macrumors 68020


    Jan 19, 2015
    Oregon, USA
    The minimum OS for installing Mojave is Mountain Lion (10.8) or newer.

    Purchase Mountain Lion from Apple:

    10.9 - 10.10 is no longer available from Apple unless you previously "purchased" (downloaded) them.

    10.11 (See Step 4):

    10.12 (See Step 4):

    10.13 (See Step 4):

    10.14 (See Step 4):
  21. Mysons thread starter macrumors newbie

    Aug 10, 2019

    I have now Software Mac OS Lion 10.7 installed - I tried to download for free from Apple Store the Mojave later version -
    It won't allow me to download - If I purchase the OS software - would it differ cause at first it Would sa I have an older version so I can download the Mojave version 10.8 or latest -

    How can I upgrade my OS to get to download Mojave 10.8 - I don't mind paying for the codes but I'm not sure if its going to work the my Macos Lion 10.7.5

    How would it work out - Will I need to downgrade OS to be able to upgrade - ?

    Any suggestions - Thanks in advance

  22. CoastalOR macrumors 68020


    Jan 19, 2015
    Oregon, USA
    Of course Mojave would not download, it is because you have 10.7 installed. Re-read the first sentence on my Post #20. In post #17 you asked for links to to download a OS higher than 10.7, my post #20 was answering that request.

    You do not need to buy & install 10.8 just to install Mojave unless you want to. You could download & install 10.11 or 10.12, for free to meet the requirements to download & install Mojave.

    I included the information about 10.13. & 10.14 so you could review the requirements and in case you need the download links. Maybe that was a mistake and it was too confusing.

    BTW: You asked about creating a bootable USB installer in Post #17. I did not answer that question since the link to "Apple Instructions" in my Post #6 had a link in the bottom "How to create a bootable installer for macOS".
  23. Mysons thread starter macrumors newbie

    Aug 10, 2019

    Thanks for all your support
    And direction including pin pointed all my miss reading
    Which you suggested and made it clear

    I have read through and highlighted the important stuff i need to follow through

    Again , sorry for being so ignorant and unaware. You made great points and suggestions

    Best Regards

    God Bless


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