How to fix thinkorswim update installation issue on macOS Sequoia 15.4.1?

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How to fix thinkorswim update installation issue on macOS Sequoia 15.4.1?

Thinkorswim hangs up on the "installing updates". Works once from a fresh download.dmg and then will not work again. Checked privacy and security - app management and thinkorswim is enabled. Running Sequoia 15.4.1 Spent 3 hours with TOS rep, and they think the OS is corrupted and preventing ThinkorSwim from launching.

Anyone experienced this issue and any recommendations?

[Re-Titled by Moderator]

iMac 21.5″, macOS 15.4

Posted on Apr 26, 2025 5:42 AM

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Answer 1

dialabrain

Level 10

136,079 points

Apr 26, 2025 5:48 AM in response to ThinkorSwim_help

ThinkorSwim_help wrote:

Anyone experienced this issue and any recommendations?

It is up to Schwaub to make sure their app is compatible. The fact it doesn't seem to be is an indication it needs updated for Sequoia 15.4.1.

Try the web version?

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