Krita overheats Macbook Pro 15"

Welcome!

I am suspicious that some background process is involved as opposed to an issue with the draw program. Are you running any anti-virus or so-called "cleaning/tune-up" apps?

There are a few things you can do at home before taking it to Apple for evaluation.

• First, review this Apple article:

See how apps affect Mac performance, battery runtime, temperature, and fan activity - Apple Support

⚠️ NOTE: Step 1 is vitally important to getting meaningful results.

The test produces a dynamic display so you need to let it run at least a minute, watching it as different processes bubble to the top. You are looking for processes other than "kernel_task" and the draw app that use 30-50 percent or more of your CPU cycles. Don't try posting a screenshot of that test's results--it is too hard to "freeze" the dynamic display where you want to--just report the names of any processes that appear "greedy"

• Second, I would visit the app developer's forums or support area if any and see if other Mac users are reporting heat with the program and no others.

• Third, you can post a snapshot of your configuration here. We can quickly and within the confines of these forums help you determine if software issues are contributing if you use EtreCheck, available free from the Mac App Store here:

https://itunes.apple.com/us/app/etrecheck/id1423715984?mt=12

We can also see hard data about drive performance and RAM usage. Etrecheck is the development of a long-serving and trusted contributor here expressly for displaying information in these forums to help us help you. It will not reveal any personal or secure information.

Run it, then select “Report" from the left-hand pane (scroll down to the bottom of that pane to find):

When its report displays, click the "Share Report" icon from EtreCheck’s toolbar and then "Copy report” from the resulting dropdown.

Please DO NOT highlight the text in the report before using Etrecheck’s “Copy report” command—that will garble the formatting and make the report slower and harder to evaluate.

NOTE: Recent changes to the forum software require you use the “Additional Text" icon (see example below) to embed the report into a post:

Paste the report into the resulting “Additional Text” window:

Also see this excellent user tip on posting text reports like EtreCheck. It is better illustrated than mine.

https://discussions.apple.com/docs/DOC-250000211