MBP unusable

[JustAnExpat]

How can I run system diagnostica With no os running?

It should be able to run without an operating system. See

Use Apple Diagnostics to test your Mac - Apple Support

Apple Diagnostics, formerly known as Apple Hardware Test, can check your Mac for hardware issues.

support.apple.com

 

[bobnugget]

One to note - after upgrading to Monterey and Ventura my 2012 unibody pros (also my 2021) ran lots of "background indexing" and the like for Spotlight, Photos, etc. This took a couple of days on the 2012's with fans on high the whole time. After that they settled down.

Almost as if the hardware is only just managing to run the modern OS They work very nicely now that has completed, though.

As others have said, this can also be the sign of a faulty/"Replace Soon" battery.

Bear in mind that *any* similarly specced Apple Silicon mac is going to be noticeably faster (even opening windows) than your 2012 if you upgraded. Yes, even the 2020 M1 MacBook Air with the same size SSD and same amount of RAM will be quicker.

 

[MacProFCP]

It runs about 2 days With Sonoma patched With opencore Legacy, now It Is impossible to install Catalina too. Really slow and keyboard and touchpad not recognized

1. Try to get rid of Sanoma. It’s bug ridden, especially for Intel Macs.

2. Try these

10 Minute Mac Fixes.pdf

Shared with Dropbox

www.dropbox.com

 

[Bradamante]

My MBP 10.1 15" i7 mid 2012 , run really slow, It is unusable, and funs are Always at Highest Speed. Reset pram and Smc, tray new battery, disconnected storage and wifi but nothing changes....no one experienced this issue?

With hardware that old I would look at replacing the CPU paste.

 

[Fishrrman]

STOP using OCLP. Get rid of it.

Use 10.15 Catalina instead.

I admit I didn't read all the replies.
Will it still boot to INTERNET recovery?
Command-OPTION-R
at boot
???

If so, boot to internet recovery
then
ERASE the ENTIRE internal drive
then
Install a clean copy of Catalina
then
Restore your data
then
FORGET ABOUT OCLP -- the more I read about it, the more it sounds like "bad news" insofar as having problems is concerned...

 

[Allen_Wentz]

That's how apple makes money, locking you into upgrade cycles by not supporting hardware you bought and forcing you to use unofficial patches.

Seriously you say that? The box is 12 years old! This thread has already burned more time than the box is worth.

 

[Squirrrrel]

Seriously you say that? The box is 12 years old! This thread has already burned more time than the box is worth.

Yeah. Macs don’t last forever. 12 years is a pretty good run. OP could get a used M1 Air on Swappa for like 500-600 bucks.

STOP using OCLP. Get rid of it.

Use 10.15 Catalina instead.

I admit I didn't read all the replies.
Will it still boot to INTERNET recovery?
Command-OPTION-R
at boot
???

If so, boot to internet recovery
then
ERASE the ENTIRE internal drive
then
Install a clean copy of Catalina
then
Restore your data
then
FORGET ABOUT OCLP -- the more I read about it, the more it sounds like "bad news" insofar as having problems is concerned...

Yeah. OP needs to start completely fresh and see if it helps.