General Information
On the 8th of September the following was released:
- ISL Light 5.0.2551.165 for Windows (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=win32,os_version=0x0a000000-0x7fffffff)
- ISL Light 5.0.2551.165 for macOS (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=mac, os_version=0x0e0000-0x2effff)
- ISL Light 5.0.2551.165 for macOS Apple silicon (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=macarm64, os_version=0x0e0000-0x2effff)
- ISL Light 5.0.2551.165 for Linux (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=linux64, os_version=0x050fc10000022300-0xffffffffffffffff)
- ISL Light Client 5.0.2551.165 for Windows (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92,platform=win32, os_version=0x0a000000-0x7fffffff)
- ISL Light Client 5.0.2551.165 for macOS (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=mac, os_version=0x0e0000-0x2effff)
- ISL Light Client 5.0.2551.165 for macOS Apple silicon (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=macarm64, os_version=0x0e0000-0x2effff)
- ISL Light Client 5.0.2551.165 for Linux (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=linux64, os_version=0x050fc10000022300-0xffffffffffffffff)
- ISL AlwaysOn 5.0.2551.165 for Windows (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=win32, os_version=0x0a000000-0x7fffffff)
- ISL AlwaysOn 5.0.2551.165 for macOS (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=mac, os_version=0x0e0000-0x2effff)
- ISL AlwaysOn 5.0.2551.165 for macOS Apple silicon (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=macarm64, os_version=0x0e0000-0x2effff)
- ISL AlwaysOn 5.0.2551.165 for Linux (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=linux64, os_version=0x050fc10000022300-0xffffffffffffffff)
- ISL Network Start 5.0.2551.16 for Windows (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=win32, os_version=0x0a000000-0x7fffffff)
- ISL Network Start 5.0.2551.16 for macOS (release_date=2026-09-07, build=eab801cfda4bba5cdf7a849022c5de3f7baa9c92, platform=mac, os_version=0x0e0000-0x2effff)
This release is available for Hosted Service users.
Improvements
ISL AlwaysOn - Desktop - Allow guest users to skip UAC when starting ISL AlwaysOn upgrade (FEATURE) [ISLALWAYSON-2064] More
Description
Starting an upgrade from ISL AlwaysOn (About window or overview) no longer requires the user to elevate. The upgrade is now handed over to the already running ISL AlwaysOn service, so users without administrative rights are not shown the Windows UAC prompt or the authentication dialog on macOS and Linux. Repeated upgrade requests within a short period are ignored while an upgrade is already running.
ISL AlwaysOn - Desktop - Rename ISL AlwaysOn setting for push upgrade - Enable automatic upgrades (DEFECT) [ISLALWAYSON-2066] More
Description
The setting under Settings -> Basic -> Computers was labelled "Enable automatic updates", which did not describe what it actually controls. It is now labelled "Allow remote upgrades".
The defect was fixed.
ISL AlwaysOn - Desktop - ISL AlwaysOn about screen shows unknown build target for user agent and undefined for platform on macarm64 (DEFECT) [ISLALWAYSON-2082] More
Description
On Macs with Apple silicon, the About window showed "undefined" as the platform and the build target was reported as unknown. The platform is now shown as macOS Apple silicon and the correct build target is reported.
The defect was fixed.
ISL AlwaysOn - Desktop - Can not uninstall ISL AlwaysOn on mac arm64 if Rosetta is not installed (DEFECT) [ISLALWAYSON-2083] More
Description
Users on Apple Silicon Macs without Rosetta installed were unable to uninstall ISL AlwaysOn, as the uninstall action prompted for a Rosetta installation. Uninstall now runs natively on arm64 Macs.
The defect was fixed.
ISL AlwaysOn - Desktop - Make sure COM is initialized during startup (DEFECT) [ISLALWAYSON-2084] More
Description
On Windows, copying certain content between the local and remote computer could fail, so clipboard data such as files or formatted content was not transferred. Clipboard handling on the remote side was corrected and the transfer now works.
The defect was fixed.
ISL AlwaysOn - Desktop - Add missing arch property to all querries (DEFECT) [ISLALWAYSON-2085] More
Description
On macOS, ISL Online programs did not report the computer's processor architecture when checking for available versions, so an Apple Silicon computer could be offered or kept on an Intel build instead of the matching native build. Programs now include the architecture in these requests: Intel Macs continue to receive Intel builds, while Apple Silicon Macs receive the native build when one is available and fall back to the Intel build when it is not.
The defect was fixed.
ISL Light - Desktop - Spawn macOS permissions for screen capture and accessibility on start of ISL Light session (FEATURE) [ISLLIGHT-7548] More
Description
On macOS, ISL Light Client now shows a permissions screen at the start of a session when screen recording or accessibility permission is missing. The screen lists each required permission with its current state and updates automatically once a permission is granted. If the user chooses to go back to the chat while a permission is still missing, a warning link is shown that reopens the permissions screen.
ISL Light - Desktop - Enable TLS 1.3 in E2E (FEATURE) [ISLLIGHT-7583] More
Description
End to end encrypted connections now negotiate TLS 1.3 when both sides support it, and fall back to TLS 1.2 otherwise. The negotiated protocol version is shown in the session security details.
ISL Light - Desktop - Remember File Manager Remote and Local Path (FEATURE) [ISLLIGHT-7610] More
Description
File Manager now reopens at the last used local and remote folder instead of returning to the desktop. The Send Files and Receive Files dialogs also open at the folder last used for sending files.
ISL Light - Desktop - Update available not reachable via accessibility (DEFECT) [ISLLIGHT-6649] More
Description
Users experienced an issue where the "Update Available" notice on the login screen could not be reached with keyboard navigation. Keyboard navigation was adjusted so the notice is now included in the tab and back-tab order when it is shown.
The defect was fixed.
ISL Light - Desktop - On login expired window you cannot return to login with keyboard navigation (DEFECT) [ISLLIGHT-6684] More
Description
Users experienced an issue where the back button on the login window could not be reached using keyboard navigation, so it was not possible to return to the previous step. Keyboard navigation was redesigned to cycle through all visible elements and the issue is no longer reproducible.
The defect was fixed.
ISL Light - Desktop - Tabs in the Share Group dialog have no state to indicate which one is active (DEFECT) [ISLLIGHT-6879] More
Description
Tabs in the Share Group and Share Computer dialogs did not indicate which tab was active to accessibility tools such as screen readers. The tabs are now exposed as a selectable list, so the active tab is announced correctly.
The defect was fixed.
ISL Light - Desktop - When using TAB on 2FA screen the focus stops moving correctly (DEFECT) [ISLLIGHT-6888] More
Description
Users experienced an issue where keyboard navigation with TAB on the two-factor authentication screen did not move focus correctly between elements. The functionality was redesigned and the issue is no longer reproducible.
The defect was fixed.
ISL Light - Desktop - The '...' row in File manager window is not handled correctly in accessibility (DEFECT) [ISLLIGHT-6925] More
Description
Users experienced an issue where the row for moving to the parent directory in the File Manager window was not exposed correctly to accessibility tools, so the whole file browser was selected instead of that row. The functionality was redesigned and the issue is no longer reproducible.
The defect was fixed.
ISL Light - Desktop - Navigation with TAB on the enter verification page and the sign in with organization page doesn't work correctly (DEFECT) [ISLLIGHT-7112] More
Description
Users experienced an issue where navigation with TAB/backTAB did not work correctly on the verification code page and the sign in with organization page. The functionality was redesigned and the issue is no longer reproducible.
The defect was fixed.
ISL Light - Desktop - "Send to ISL Light Client" missing in new Client (DEFECT) [ISLLIGHT-7569] More
Description
The option to send files to the remote side was missing in the new ISL Light Client. The option is available again.
The defect was fixed.
ISL Light - Desktop - Send to device shows .lnk on client side (DEFECT) [ISLLIGHT-7601] More
Description
Users experienced an issue where the file transfer window on the client side showed ".lnk" instead of the application title when files were sent to the device. The functionality was redesigned and the correct title is now shown.
The defect was fixed.
ISL Light - Desktop - ISL Light about screen shows unknown build target for user agent and undefined for platform on macarm64 (DEFECT) [ISLLIGHT-7609] More
Description
On Macs with Apple silicon, the About window showed "undefined" as the platform and the build target was reported as unknown. The platform is now shown as macOS Apple silicon and the correct build target is reported.
The defect was fixed.
ISL Light - Desktop - Add missing arch property to all querries (DEFECT) [ISLLIGHT-7611] More
Description
On macOS, ISL Online programs did not report the computer's processor architecture when checking for available versions, so an Apple Silicon computer could be offered or kept on an Intel build instead of the matching native build. Programs now include the architecture in these requests: Intel Macs continue to receive Intel builds, while Apple Silicon Macs receive the native build when one is available and fall back to the Intel build when it is not.
The defect was fixed.
ISL Start - Desktop - Save launch info to file (FEATURE) [ISLSTART-173] More
Description
ISL Network Start now writes the original name of the downloaded program into a startup information file. Other ISL programs, such as ISL AlwaysOn, can read this file during their launch.
ISL Start - Desktop - Send arch in NS query string to ICP (FEATURE) [ISLSTART-174] More
Description
On macOS, ISL Network Start now detects the processor architecture (arm64 or x86_64) at runtime and reports it to ISL Conference Proxy when requesting a program, so the matching executable is served for universal builds.