Upgrade to Catalina from Mojave

[diegodp]

Hi guys,
due to software compatibility, I should upgrade my iMac (Late 2012, 2.7Ghz i5 - 8GB RAM DDR3 - Geforce GT 640M 512mb video - Sata disk 1TB) from Mojave OS to Catalina OS.

I've got some doubts, because I would't like to lose actual speed or increase lag during work with new OS.

What do you advice me? May I upgrade my iMac to new os or try to stay on Mojave still on?

Thank you

 

[Fishrrman]

"I've got some doubts, because I would't like to lose actual speed or increase lag during work with new OS.
What do you advice me?"

The 2012 iMac has USB3 ports, but also that internal drive is a platter-based hard drive, right?
It will probably be s_l_o_w ...

My suggestion:
Don't upgrade the internal drive.
Instead, get an EXTERNAL USB3 SSD.
It doesn't have to be large -- 512gb is probably "large enough".
Install Catalina onto it.
Put the apps you need onto it, along with a user account, etc.

Now, you can boot and run from the external SSD, and it will be FASTER THAN running from the internal HDD.
And you'll still have Mojave (one of the best OS versions) on the internal drive if you need it.

 

[diegodp]

The 2012 iMac has USB3 ports, but also that internal drive is a platter-based hard drive, right?
It will probably be s_l_o_w ...

I've upgrade my iMac one year ago with a new SATA hard disk, changing the original platter-based hd.

Do you still advice me some opinion?

In any case:
Is there any website/software such as benchmark where I could test any os upgrade (or downgrade)?

 

[Fishrrman]

"I've upgrade my iMac one year ago with a new SATA hard disk, changing the original platter-based hd."

What does "SATA hard disk" mean?
Is it still a platter-based drive?
Or... is it an SSD?

IF it's an SSD, you can install the new OS there, and it should run fine.

 

[diegodp]

"I've upgrade my iMac one year ago with a new SATA hard disk, changing the original platter-based hd."

What does "SATA hard disk" mean?
Is it still a platter-based drive?
Or... is it an SSD?

IF it's an SSD, you can install the new OS there, and it should run fine.

I get wrong!
Of course is a new SSD...