Macbook pro mid-2012 15" slow on High Sierra

[Flávio Soares]

Hello. After upgrading to High Sierra my Macbook pro mid-2012 15" (i7, 16GB RAM) got a little slower. Recently it got a little worse even with little RAM and CPU usage and plenty of disk space (80 GB, not-SSD). Even Firefox seems slower everyday. Finder menus responsiveness decreased.
Disk utility says disks are fine.
Any clues?

thank you

 

[CoastalOR]

I think you will need to replace your HDD with a SSD or revert back to a earlier OS that performs satisfactorily for you using a HDD.

 

[Taz Mangus]

Hello. After upgrading to High Sierra my Macbook pro mid-2012 15" (i7, 16GB RAM) got a little slower. Recently it got slower even with little RAM and CPU usage and plenty of disk space (80 GB, not-SSD). Even Firefox seems slower everyday. Quicktime Player cannot deliver 30fps on MP4 full hd. Finder menus responsiveness decreased.
Disk utility says disks are fine.
Any clues?

thank you

If you installed High Sierra without telling it to not use APFS then it converted your drive to use APFS instead of using HFS+. That is why the system probably feels more sluggish. You will need to reinstall High Sierra without having it use APFS. Make sure you have a backup of your hard drive, download the full High Sierra installer. After the installer finished downloading, quit the installer.

‎macOS High Sierra

‎New technologies at the heart of the system make your Mac more reliable, capable, and responsive — and lay the foundation for future innovations. macOS High Sierra also refines the features and apps you use every day. It’s macOS at its highest level yet. Easily organize, edit and view your...

apps.apple.com

Create a bootable USB installer following the instructions in the link below where you tell the installer not to use APFS.

Boot to the installer, launch Disk Utility, erase your internal hard drive as Macintosh Extended OS (journaled). Quit Disk Utility and install High Sierra. After the install finishes, setup the computer and choose to have your user data migrated from your backup.

How to upgrade macOS to High Sierra without filesystem change

During the installation of developer and beta versions of macOS High Sierra, user was asked if he/she wants to "upgrade file system to APFS". With the final (17A365) version of High Sierra, such question is no longer displayed. It is however still possible to avoid filesystem conversion and keep...

malcont.net

 

[Flávio Soares]

Thanks. No APFS being used.