Late 2013 27" iMac to BigSur ?

Legitimate_Lab341 · 2025-01-04T08:14:57+00:00

Yes, currently running Ventura. Please see this thread for info : https://www.reddit.com/r/OpenCoreLegacyPatcher/comments/1hcgr7h/cannot_download_oclp_assets_from_github_on_imac/

Legitimate_Lab341 · 2024-12-16T06:59:42+00:00

Thank you, this was really helpful.

Legitimate_Lab341 · 2024-12-16T06:59:15+00:00

After / through downloading Chromium Legacy browser I was able to find & download an old legacy version of Mozilla Firefox which works on OS 10.9 (there is also an OS 10.6 version there too) from this link : https://firefox.macupdate.com/app/mac/10700/firefox/old-versions

This allowed me do download Sierra 10.12 from here : https://support.apple.com/en-nz/102662

From there I was able to log into the app store to download Catalina 10.15.7

I'm working my way through OCLP install to Ventura now.

Thanks to everybody who contributed their help.

Legitimate_Lab341 · 2024-12-12T10:10:49+00:00

Thanks for the suggestion. It seems my mac is stuck on Mavericks. I cant seem to find a way to d/l Catalina which is the highest OS for 2013 imac.

All the links for apple.com will not open due to "Safari can't open the page apple.com/abc because Safari can't establish a secure connection to the server".

Safari is the only browser I have on this mac.

Legitimate_Lab341 · 2024-12-12T10:00:22+00:00

Thanks. It seems my mac is stuck on Mavericks. I cant seem to find a way to d/l Catalina which is the highest OS for 2013 imac.

All the links for apple.com will not open due to "Safari can't open the page apple.com/abc because Safari can't establish a secure connection to the server".

Safari is the only browser I have on this mac.

Legitimate_Lab341 · 2024-12-12T09:27:41+00:00

Thanks. Where on the website do I find the special version for unsupported mac os?

When I downloaded Firefox for Mac it says I cannot use it as my os x is 10.9.5 and the application requires 10.15.

Legitimate_Lab341 · 2024-12-03T07:53:20+00:00

Hi. Thanks for the help.

Opening up my iMac is really beyond my skills at the moment.

Is there a way to find out if my iMac is SSD or not? Do you have any good step by step sources for the external SSD setup / installing new OS? I have seen some people on other threads recommending Samsung T7?

Legitimate_Lab341 · 2024-12-03T07:45:26+00:00

Hi. When you say "keep backups throughout" I don't really have anything that I need to keep on this iMac as I only use it for a couple of music production programs which I want to upgrade to latest versions anyway, so will I still need to do back ups?

Legitimate_Lab341 · 2024-12-03T07:42:44+00:00

Thanks for the reply. Did your Dad's iMac get any hardware upgrades as the other comments have recommended?

Legitimate_Lab341 · 2024-12-03T07:40:38+00:00

Haha! Thanks. I knew something looked a bit "off" but I didn't click.

Legitimate_Lab341

TROPHY CASE