Macbook Pro sometimes gets slow/laggy. Help
Hi,
So I have a MPB 13" Late 2011, upgrade to 6gb ram and 125gb ssd (55gb free space)
I know it's old, but I'm a Student so my budget is tight and as I always wanted to have a Macbook I decided that I'm probably going to get better performance from an old Macbook, then a new cheap windows pc.
My problem is that lately it became slow, when I'm watching a video on Youtube the image gets "stuck" then skips a few seconds and similar, after when I play the next one it loads the video in a decent speed, but the rest of the page doesn't load for 10-20 more seconds. Obviously it's annoying. I'm sure it was faster a few months ago when I got it. Mostly I have safari, word and whatsapp open, I'm not using 20 apps at the same time.
Another thing is that it becomes slower when it's charging, I read online about deleting the plist file, but I can't do it, it says that OS is using it.
My battery status changed from normal to replace soon a few days ago (the problems started before that).
Full Charge Capacity (mAh): 3719
Cycle count: 1349 (I know it's a lot)
On Activity Monitor, CPU is low even when its lagging, and mostly there is 2gb of free ram
I did First Aid on Utility Disk, no problem there.
Scanned, no viruses
Safari using only 1 extension (adblock)
Cache and junk files regularly deleted
What is making my MBP slow? Can the battery influence the performance and making it slow even though its not even saying to replace it?
I'm open for any suggestions and thanks for your time!
MacBook Pro 13", macOS 10.13